639231774146432 has 16 divisors (see below), whose sum is σ = 1273469550057600. Its totient is φ = 319615887073152.

The previous prime is 639231774146423. The next prime is 639231774146473. The reversal of 639231774146432 is 234641477132936.

639231774146432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×639231774146432² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2496999117632 + ... + 2496999117887.

It is an arithmetic number, because the mean of its divisors is an integer number (79591846878600).

Almost surely, 2^{639231774146432} is an apocalyptic number.

It is an amenable number.

639231774146432 is a deficient number, since it is larger than the sum of its proper divisors (634237775911168).

639231774146432 is an equidigital number, since it uses as much as digits as its factorization.

639231774146432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4993998235533 (or 4993998235521 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 62.

The spelling of 639231774146432 in words is "six hundred thirty-nine trillion, two hundred thirty-one billion, seven hundred seventy-four million, one hundred forty-six thousand, four hundred thirty-two".