716638437025 has 135 divisors (see below), whose sum is σ = 1107671297859. Its totient is φ = 458597129760.

The previous prime is 716638437019. The next prime is 716638437037. The reversal of 716638437025 is 520734836617.

The square root of 716638437025 is 846545.

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

It can be written as a sum of positive squares in only one way, i.e., 257989837329 + 458648599696 = 507927^2 + 677236^2 .

It is not a de Polignac number, because 716638437025 - 2⁹ = 716638436513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 10696096042 + ... + 10696096108.

Almost surely, 2^716638437025 is an apocalyptic number.

716638437025 is the 846545-th square number.

716638437025 is the 423273-rd centered octagonal number.

It is an amenable number.

716638437025 is a deficient number, since it is larger than the sum of its proper divisors (391032860834).

716638437025 is an frugal number, since it uses more digits than its factorization.

716638437025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 716638437025 in words is "seven hundred sixteen billion, six hundred thirty-eight million, four hundred thirty-seven thousand, twenty-five".