638632600047 has 40 divisors (see below), whose sum is σ = 1046776699584. Its totient is φ = 385589460672.

The previous prime is 638632599991. The next prime is 638632600069. The reversal of 638632600047 is 740006236836.

638632600047 is a `hidden beast` number, since 6 + 3 + 8 + 6 + 32 + 600 + 0 + 4 + 7 = 666.

638632600047 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 638632600047 - 2²⁰ = 638631551471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 638632599975 and 638632600011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638632600547) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5665783 + ... + 5777400.

Almost surely, 2^638632600047 is an apocalyptic number.

638632600047 is a deficient number, since it is larger than the sum of its proper divisors (408144099537).

638632600047 is a wasteful number, since it uses less digits than its factorization.

638632600047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11443261 (or 11443252 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 638632600047 in words is "six hundred thirty-eight billion, six hundred thirty-two million, six hundred thousand, forty-seven".