30644446057 has 4 divisors (see below), whose sum is σ = 30947856516. Its totient is φ = 30341035600.

The previous prime is 30644446043. The next prime is 30644446061. The reversal of 30644446057 is 75064444603.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75064444603 = 4903 ⋅15309901.

It can be written as a sum of positive squares in 2 ways, for example, as 29575744576 + 1068701481 = 171976^2 + 32691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30644446057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30644446067) 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, 151705078 + ... + 151705279.

It is an arithmetic number, because the mean of its divisors is an integer number (7736964129).

Almost surely, 2^30644446057 is an apocalyptic number.

It is an amenable number.

30644446057 is a deficient number, since it is larger than the sum of its proper divisors (303410459).

30644446057 is a wasteful number, since it uses less digits than its factorization.

30644446057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303410458.

The product of its (nonzero) digits is 967680, while the sum is 43.

The spelling of 30644446057 in words is "thirty billion, six hundred forty-four million, four hundred forty-six thousand, fifty-seven".