638376226312 has 32 divisors (see below), whose sum is σ = 1307527116480. Its totient is φ = 289780442560.

The previous prime is 638376226303. The next prime is 638376226333. The reversal of 638376226312 is 213622673836.

It is a super-2 number, since 2×638376226312² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4816363 + ... + 4947130.

It is an arithmetic number, because the mean of its divisors is an integer number (40860222390).

Almost surely, 2^638376226312 is an apocalyptic number.

It is an amenable number.

638376226312 is an abundant number, since it is smaller than the sum of its proper divisors (669150890168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638376226312 is a wasteful number, since it uses less digits than its factorization.

638376226312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764253 (or 9764249 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 49.

The spelling of 638376226312 in words is "six hundred thirty-eight billion, three hundred seventy-six million, two hundred twenty-six thousand, three hundred twelve".