47507931681 has 32 divisors (see below), whose sum is σ = 77383047168. Its totient is φ = 25333714560.

The previous prime is 47507931637. The next prime is 47507931697. The reversal of 47507931681 is 18613970574.

It is a happy number.

It is not a de Polignac number, because 47507931681 - 2¹⁹ = 47507407393 is a prime.

It is a super-2 number, since 2×47507931681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47507931181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1179711 + ... + 1219316.

It is an arithmetic number, because the mean of its divisors is an integer number (2418220224).

Almost surely, 2^47507931681 is an apocalyptic number.

47507931681 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

47507931681 is a deficient number, since it is larger than the sum of its proper divisors (29875115487).

47507931681 is a wasteful number, since it uses less digits than its factorization.

47507931681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399101.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 47507931681 in words is "forty-seven billion, five hundred seven million, nine hundred thirty-one thousand, six hundred eighty-one".