638733085471392 has 48 divisors (see below), whose sum is σ = 1676768216840640. Its totient is φ = 212899108810752.

The previous prime is 638733085471361. The next prime is 638733085471399. The reversal of 638733085471392 is 293174580337836.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (638733085471399) 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, 184521217 + ... + 187950912.

It is an arithmetic number, because the mean of its divisors is an integer number (34932671184180).

It is a 1-persistent number, because it is pandigital, but 2⋅638733085471392 = 1277466170942784 is not.

Almost surely, 2^{638733085471392} is an apocalyptic number.

It is an amenable number.

638733085471392 is an abundant number, since it is smaller than the sum of its proper divisors (1038035131369248).

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

638733085471392 is a wasteful number, since it uses less digits than its factorization.

638733085471392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372490005 (or 372489997 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 69.

The spelling of 638733085471392 in words is "six hundred thirty-eight trillion, seven hundred thirty-three billion, eighty-five million, four hundred seventy-one thousand, three hundred ninety-two".