512645640442 has 32 divisors (see below), whose sum is σ = 834792763392. Its totient is φ = 234699825024.

The previous prime is 512645640431. The next prime is 512645640457. The reversal of 512645640442 is 244046546215.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24533323 + ... + 24554209.

It is an arithmetic number, because the mean of its divisors is an integer number (26087273856).

Almost surely, 2^512645640442 is an apocalyptic number.

512645640442 is a deficient number, since it is larger than the sum of its proper divisors (322147122950).

512645640442 is a wasteful number, since it uses less digits than its factorization.

512645640442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28462.

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 512645640442 in words is "five hundred twelve billion, six hundred forty-five million, six hundred forty thousand, four hundred forty-two".