764216898025 has 27 divisors (see below), whose sum is σ = 1102388020869. Its totient is φ = 524013463680.

The previous prime is 764216897987. The next prime is 764216898061. The reversal of 764216898025 is 520898612467.

The square root of 764216898025 is 874195.

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 387893541721 + 376323356304 = 622811^2 + 613452^2 .

It is not a de Polignac number, because 764216898025 - 2¹¹ = 764216895977 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, 30584337 + ... + 30609313.

Almost surely, 2^764216898025 is an apocalyptic number.

764216898025 is the 874195-th square number.

764216898025 is the 437098-th centered octagonal number.

It is an amenable number.

764216898025 is a deficient number, since it is larger than the sum of its proper divisors (338171122844).

764216898025 is an frugal number, since it uses more digits than its factorization.

764216898025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49978 (or 24989 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 764216898025 in words is "seven hundred sixty-four billion, two hundred sixteen million, eight hundred ninety-eight thousand, twenty-five".