764215025 has 36 divisors (see below), whose sum is σ = 1167216588. Its totient is φ = 493194240.

The previous prime is 764215021. The next prime is 764215033. The reversal of 764215025 is 520512467.

It can be written as a sum of positive squares in 6 ways, for example, as 15864289 + 748350736 = 3983^2 + 27356^2 .

It is not a de Polignac number, because 764215025 - 2² = 764215021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 764214982 and 764215000.

It is not an unprimeable number, because it can be changed into a prime (764215021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2477 + ... + 39173.

It is an arithmetic number, because the mean of its divisors is an integer number (32422683).

Almost surely, 2^764215025 is an apocalyptic number.

It is an amenable number.

764215025 is a deficient number, since it is larger than the sum of its proper divisors (403001563).

764215025 is a wasteful number, since it uses less digits than its factorization.

764215025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36738 (or 36726 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 764215025 is about 27644.4393142635. The cubic root of 764215025 is about 914.2645009668.

The spelling of 764215025 in words is "seven hundred sixty-four million, two hundred fifteen thousand, twenty-five".