6399977150638 has 8 divisors (see below), whose sum is σ = 9643014900288. Its totient is φ = 3185638850544.

The previous prime is 6399977150629. The next prime is 6399977150653. The reversal of 6399977150638 is 8360517799936.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 7174861831 + ... + 7174862722.

It is an arithmetic number, because the mean of its divisors is an integer number (1205376862536).

Almost surely, 2^{6399977150638} is an apocalyptic number.

6399977150638 is a deficient number, since it is larger than the sum of its proper divisors (3243037749650).

6399977150638 is a wasteful number, since it uses less digits than its factorization.

6399977150638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14349724778.

The product of its (nonzero) digits is 462944160, while the sum is 73.

The spelling of 6399977150638 in words is "six trillion, three hundred ninety-nine billion, nine hundred seventy-seven million, one hundred fifty thousand, six hundred thirty-eight".