320631620154513 has 32 divisors (see below), whose sum is σ = 437958918576000. Its totient is φ = 208582986264576.

The previous prime is 320631620154509. The next prime is 320631620154533. The reversal of 320631620154513 is 315451026136023.

It is a happy number.

It is not a de Polignac number, because 320631620154513 - 2² = 320631620154509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320631620154533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349916245 + ... + 350831357.

It is an arithmetic number, because the mean of its divisors is an integer number (13686216205500).

Almost surely, 2^{320631620154513} is an apocalyptic number.

It is an amenable number.

320631620154513 is a deficient number, since it is larger than the sum of its proper divisors (117327298421487).

320631620154513 is a wasteful number, since it uses less digits than its factorization.

320631620154513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929761.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 320631620154513 in words is "three hundred twenty trillion, six hundred thirty-one billion, six hundred twenty million, one hundred fifty-four thousand, five hundred thirteen".