1001638547864 has 16 divisors (see below), whose sum is σ = 1878754509720. Its totient is φ = 500637345280.

The previous prime is 1001638547857. The next prime is 1001638547881. The reversal of 1001638547864 is 4687458361001.

1001638547864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 22717682 + ... + 22761729.

Almost surely, 2^{1001638547864} is an apocalyptic number.

It is an amenable number.

1001638547864 is a deficient number, since it is larger than the sum of its proper divisors (877115961856).

1001638547864 is a wasteful number, since it uses less digits than its factorization.

1001638547864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45482170 (or 45482166 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 1001638547864 in words is "one trillion, one billion, six hundred thirty-eight million, five hundred forty-seven thousand, eight hundred sixty-four".