120640726431 has 32 divisors (see below), whose sum is σ = 181701964800. Its totient is φ = 79094141280.

The previous prime is 120640726429. The next prime is 120640726441. The reversal of 120640726431 is 134627046021.

120640726431 is a `hidden beast` number, since 1 + 2 + 0 + 6 + 4 + 0 + 7 + 2 + 643 + 1 = 666.

It is not a de Polignac number, because 120640726431 - 2¹ = 120640726429 is a prime.

It is a super-2 number, since 2×120640726431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120640726411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681790 + ... + 840308.

It is an arithmetic number, because the mean of its divisors is an integer number (5678186400).

Almost surely, 2^120640726431 is an apocalyptic number.

120640726431 is a deficient number, since it is larger than the sum of its proper divisors (61061238369).

120640726431 is a wasteful number, since it uses less digits than its factorization.

120640726431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158996 (or 158990 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 120640726431 in words is "one hundred twenty billion, six hundred forty million, seven hundred twenty-six thousand, four hundred thirty-one".