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19009515625 = 5611032
BaseRepresentation
bin10001101101000011…
…100011000001101001
31211001210202110010021
4101231003203001221
5302412414000000
612422143520441
71242034134232
oct215503430151
954053673107
1019009515625
1180754154a1
1238262b9121
131a3c41c9c9
14cc4934089
15763d1911a
hex46d0e3069

19009515625 has 21 divisors (see below), whose sum is σ = 23783152603. Its totient is φ = 15193825000.

The previous prime is 19009515619. The next prime is 19009515683. The reversal of 19009515625 is 52651590091.

The square root of 19009515625 is 137875.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 16654160601 + 2355355024 = 129051^2 + 48532^2 .

It is not a de Polignac number, because 19009515625 - 223 = 19001127017 is a prime.

It is a super-2 number, since 2×190095156252 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 17233824 + ... + 17234926.

Almost surely, 219009515625 is an apocalyptic number.

19009515625 is the 137875-th square number.

19009515625 is the 68938-th centered octagonal number.

It is an amenable number.

19009515625 is a deficient number, since it is larger than the sum of its proper divisors (4773636978).

19009515625 is an frugal number, since it uses more digits than its factorization.

19009515625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 43.

The spelling of 19009515625 in words is "nineteen billion, nine million, five hundred fifteen thousand, six hundred twenty-five".

Divisors: 1 5 25 125 625 1103 3125 5515 15625 27575 137875 689375 1216609 3446875 6083045 17234375 30415225 152076125 760380625 3801903125 19009515625