638434751362 has 16 divisors (see below), whose sum is σ = 973630041120. Its totient is φ = 313907920128.

The previous prime is 638434751359. The next prime is 638434751363. The reversal of 638434751362 is 263157434836.

It is not an unprimeable number, because it can be changed into a prime (638434751363) 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, 4051312 + ... + 4205947.

It is an arithmetic number, because the mean of its divisors is an integer number (60851877570).

Almost surely, 2^638434751362 is an apocalyptic number.

638434751362 is a deficient number, since it is larger than the sum of its proper divisors (335195289758).

638434751362 is a wasteful number, since it uses less digits than its factorization.

638434751362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257905.

The product of its digits is 8709120, while the sum is 52.

The spelling of 638434751362 in words is "six hundred thirty-eight billion, four hundred thirty-four million, seven hundred fifty-one thousand, three hundred sixty-two".