30644999457 has 4 divisors (see below), whose sum is σ = 40859999280. Its totient is φ = 20429999636.

The previous prime is 30644999447. The next prime is 30644999479. The reversal of 30644999457 is 75499944603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30644999457 - 2⁸ = 30644999201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30644999457.

It is not an unprimeable number, because it can be changed into a prime (30644999447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5107499907 + ... + 5107499912.

It is an arithmetic number, because the mean of its divisors is an integer number (10214999820).

Almost surely, 2^30644999457 is an apocalyptic number.

It is an amenable number.

30644999457 is a deficient number, since it is larger than the sum of its proper divisors (10214999823).

30644999457 is a wasteful number, since it uses less digits than its factorization.

30644999457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10214999822.

The product of its (nonzero) digits is 29393280, while the sum is 60.

The spelling of 30644999457 in words is "thirty billion, six hundred forty-four million, nine hundred ninety-nine thousand, four hundred fifty-seven".