695204096521 has 27 divisors (see below), whose sum is σ = 769827168999. Its totient is φ = 627342843600.

The previous prime is 695204096519. The next prime is 695204096533. The reversal of 695204096521 is 125690402596.

The square root of 695204096521 is 833789.

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., 647479324921 + 47724771600 = 804661^2 + 218460^2 .

It is not a de Polignac number, because 695204096521 - 2¹ = 695204096519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (695204096501) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2100314326 + ... + 2100314656.

Almost surely, 2^695204096521 is an apocalyptic number.

695204096521 is the 833789-th square number.

695204096521 is the 416895-th centered octagonal number.

It is an amenable number.

695204096521 is a deficient number, since it is larger than the sum of its proper divisors (74623072478).

695204096521 is an frugal number, since it uses more digits than its factorization.

695204096521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 49.

Multiplying 695204096521 by its sum of digits (49), we get a square (34065000729529 = 5836523²).

The spelling of 695204096521 in words is "six hundred ninety-five billion, two hundred four million, ninety-six thousand, five hundred twenty-one".