9715857440644 has 12 divisors (see below), whose sum is σ = 17002788763968. Its totient is φ = 4857917793800.

The previous prime is 9715857440567. The next prime is 9715857440693. The reversal of 9715857440644 is 4460447585179.

9715857440644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534592 + ... + 4440439.

It is an arithmetic number, because the mean of its divisors is an integer number (1416899063664).

Almost surely, 2^{9715857440644} is an apocalyptic number.

It is an amenable number.

9715857440644 is a deficient number, since it is larger than the sum of its proper divisors (7286931323324).

9715857440644 is a wasteful number, since it uses less digits than its factorization.

9715857440644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463266 (or 5463264 counting only the distinct ones).

The product of its (nonzero) digits is 135475200, while the sum is 64.

The spelling of 9715857440644 in words is "nine trillion, seven hundred fifteen billion, eight hundred fifty-seven million, four hundred forty thousand, six hundred forty-four".