646234551025 has 18 divisors (see below), whose sum is σ = 932160370470. Its totient is φ = 443132262720.

The previous prime is 646234550999. The next prime is 646234551043. The reversal of 646234551025 is 520155432646.

It can be written as a sum of positive squares in 3 ways, for example, as 151046490609 + 495188060416 = 388647^2 + 703696^2 .

It is not a de Polignac number, because 646234551025 - 2³⁵ = 611874812657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 263767980 + ... + 263770429.

Almost surely, 2^646234551025 is an apocalyptic number.

It is an amenable number.

646234551025 is a deficient number, since it is larger than the sum of its proper divisors (285925819445).

646234551025 is a wasteful number, since it uses less digits than its factorization.

646234551025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527538433 (or 527538421 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 646234551025 in words is "six hundred forty-six billion, two hundred thirty-four million, five hundred fifty-one thousand, twenty-five".