19111680025 has 27 divisors (see below), whose sum is σ = 24300219519. Its totient is φ = 14910552720.

The previous prime is 19111680019. The next prime is 19111680031. The reversal of 19111680025 is 52008611191.

The square root of 19111680025 is 138245.

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

It is an interprime number because it is at equal distance from previous prime (19111680019) and next prime (19111680031).

It can be written as a sum of positive squares in only one way, i.e., 6880204809 + 12231475216 = 82947^2 + 110596^2 .

It is not a de Polignac number, because 19111680025 - 2²⁷ = 18977462297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 29722354 + ... + 29722996.

Almost surely, 2^19111680025 is an apocalyptic number.

19111680025 is the 138245-th square number.

19111680025 is the 69123-rd centered octagonal number.

It is an amenable number.

19111680025 is a deficient number, since it is larger than the sum of its proper divisors (5188539494).

19111680025 is an frugal number, since it uses more digits than its factorization.

19111680025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 34.

The spelling of 19111680025 in words is "nineteen billion, one hundred eleven million, six hundred eighty thousand, twenty-five".