638054356311 has 12 divisors (see below), whose sum is σ = 921977102592. Its totient is φ = 425211248256.

The previous prime is 638054356297. The next prime is 638054356327. The reversal of 638054356311 is 113653450836.

638054356311 is a `hidden beast` number, since 6 + 3 + 8 + 0 + 5 + 4 + 3 + 5 + 631 + 1 = 666.

It is not a de Polignac number, because 638054356311 - 2⁵ = 638054356279 is a prime.

It is a super-2 number, since 2×638054356311² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638054356711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13168026 + ... + 13216391.

It is an arithmetic number, because the mean of its divisors is an integer number (76831425216).

Almost surely, 2^638054356311 is an apocalyptic number.

638054356311 is a deficient number, since it is larger than the sum of its proper divisors (283922746281).

638054356311 is a wasteful number, since it uses less digits than its factorization.

638054356311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26387110 (or 26387107 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 638054356311 in words is "six hundred thirty-eight billion, fifty-four million, three hundred fifty-six thousand, three hundred eleven".