699807537025 has 9 divisors (see below), whose sum is σ = 867766532521. Its totient is φ = 559842683440.

The previous prime is 699807537017. The next prime is 699807537061. The reversal of 699807537025 is 520735708996.

The square root of 699807537025 is 836545.

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

It can be written as a sum of positive squares in 4 ways, for example, as 60933441409 + 638874095616 = 246847^2 + 799296^2 .

It is not a de Polignac number, because 699807537025 - 2³ = 699807537017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4099071 + ... + 4266379.

Almost surely, 2^699807537025 is an apocalyptic number.

699807537025 is the 836545-th square number.

699807537025 is the 418273-rd centered octagonal number.

It is an amenable number.

699807537025 is a deficient number, since it is larger than the sum of its proper divisors (167958995496).

699807537025 is an frugal number, since it uses more digits than its factorization.

699807537025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334628 (or 167314 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 61.

The spelling of 699807537025 in words is "six hundred ninety-nine billion, eight hundred seven million, five hundred thirty-seven thousand, twenty-five".