638473464374836 has 24 divisors (see below), whose sum is σ = 1176137004087360. Its totient is φ = 302434368206400.

The previous prime is 638473464374813. The next prime is 638473464374839.

638473464374836 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (76).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638473464374839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51322641 + ... + 62537671.

It is an arithmetic number, because the mean of its divisors is an integer number (49005708503640).

Almost surely, 2^{638473464374836} is an apocalyptic number.

It is an amenable number.

638473464374836 is a deficient number, since it is larger than the sum of its proper divisors (537663539712524).

638473464374836 is a wasteful number, since it uses less digits than its factorization.

638473464374836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964135 (or 11964133 counting only the distinct ones).

The product of its digits is 14046068736, while the sum is 76.

The spelling of 638473464374836 in words is "six hundred thirty-eight trillion, four hundred seventy-three billion, four hundred sixty-four million, three hundred seventy-four thousand, eight hundred thirty-six".