738996643431 has 40 divisors (see below), whose sum is σ = 1142331766400. Its totient is φ = 475605665280.

The previous prime is 738996643423. The next prime is 738996643507. The reversal of 738996643431 is 134346699837.

738996643431 is a `hidden beast` number, since 7 + 3 + 89 + 96 + 6 + 434 + 31 = 666.

It is not a de Polignac number, because 738996643431 - 2³ = 738996643423 is a prime.

It is a super-2 number, since 2×738996643431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (738996643531) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 667215 + ... + 1386783.

It is an arithmetic number, because the mean of its divisors is an integer number (28558294160).

Almost surely, 2^738996643431 is an apocalyptic number.

738996643431 is a deficient number, since it is larger than the sum of its proper divisors (403335122969).

738996643431 is a wasteful number, since it uses less digits than its factorization.

738996643431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720021 (or 720012 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 738996643431 in words is "seven hundred thirty-eight billion, nine hundred ninety-six million, six hundred forty-three thousand, four hundred thirty-one".