37431681321 has 48 divisors (see below), whose sum is σ = 52652514240. Its totient is φ = 23648486400.

The previous prime is 37431681311. The next prime is 37431681323. The reversal of 37431681321 is 12318613473.

It is not a de Polignac number, because 37431681321 - 2⁷ = 37431681193 is a prime.

It is a super-2 number, since 2×37431681321² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 37431681321.

It is not an unprimeable number, because it can be changed into a prime (37431681323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28993686 + ... + 28994976.

It is an arithmetic number, because the mean of its divisors is an integer number (1096927380).

Almost surely, 2^37431681321 is an apocalyptic number.

37431681321 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

37431681321 is a deficient number, since it is larger than the sum of its proper divisors (15220832919).

37431681321 is a wasteful number, since it uses less digits than its factorization.

37431681321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558 (or 1527 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The spelling of 37431681321 in words is "thirty-seven billion, four hundred thirty-one million, six hundred eighty-one thousand, three hundred twenty-one".