84404775625 has 15 divisors (see below), whose sum is σ = 105481284403. Its totient is φ = 67518010000.

The previous prime is 84404775601. The next prime is 84404775659. The reversal of 84404775625 is 52657740448.

The square root of 84404775625 is 290525.

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

It can be written as a sum of positive squares in 7 ways, for example, as 84400127289 + 4648336 = 290517^2 + 2156^2 .

It is not a de Polignac number, because 84404775625 - 2¹⁷ = 84404644553 is a prime.

It is a super-2 number, since 2×84404775625² (a number of 23 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 14 ways as a sum of consecutive naturals, for example, 7257315 + ... + 7268935.

Almost surely, 2^84404775625 is an apocalyptic number.

84404775625 is the 290525-th square number.

84404775625 is the 145263-rd centered octagonal number.

It is an amenable number.

84404775625 is a deficient number, since it is larger than the sum of its proper divisors (21076508778).

84404775625 is an frugal number, since it uses more digits than its factorization.

84404775625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23262 (or 11626 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 52.

The spelling of 84404775625 in words is "eighty-four billion, four hundred four million, seven hundred seventy-five thousand, six hundred twenty-five".