638046210513 has 16 divisors (see below), whose sum is σ = 886865905152. Its totient is φ = 407567040000.

The previous prime is 638046210499. The next prime is 638046210517. The reversal of 638046210513 is 315012640836.

It is not a de Polignac number, because 638046210513 - 2²⁰ = 638045161937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638046210517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33954528 + ... + 33973313.

It is an arithmetic number, because the mean of its divisors is an integer number (55429119072).

Almost surely, 2^638046210513 is an apocalyptic number.

It is an amenable number.

638046210513 is a deficient number, since it is larger than the sum of its proper divisors (248819694639).

638046210513 is a wasteful number, since it uses less digits than its factorization.

638046210513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67927976.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 638046210513 in words is "six hundred thirty-eight billion, forty-six million, two hundred ten thousand, five hundred thirteen".