30257831644 has 12 divisors (see below), whose sum is σ = 54077827104. Its totient is φ = 14807023904.

The previous prime is 30257831623. The next prime is 30257831671. The reversal of 30257831644 is 44613875203.

It is a self number, because there is not a number n which added to its sum of digits gives 30257831644.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 80472769 + ... + 80473144.

It is an arithmetic number, because the mean of its divisors is an integer number (4506485592).

Almost surely, 2^30257831644 is an apocalyptic number.

It is an amenable number.

30257831644 is a deficient number, since it is larger than the sum of its proper divisors (23819995460).

30257831644 is a wasteful number, since it uses less digits than its factorization.

30257831644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160945964 (or 160945962 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 30257831644 in words is "thirty billion, two hundred fifty-seven million, eight hundred thirty-one thousand, six hundred forty-four".