120640691486280 has 128 divisors (see below), whose sum is σ = 415197948211200. Its totient is φ = 27470167180032.

The previous prime is 120640691486279. The next prime is 120640691486281. The reversal of 120640691486280 is 82684196046021.

It is an interprime number because it is at equal distance from previous prime (120640691486279) and next prime (120640691486281).

It is a self number, because there is not a number n which added to its sum of digits gives 120640691486280.

It is not an unprimeable number, because it can be changed into a prime (120640691486281) 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, 272820660 + ... + 273262499.

It is an arithmetic number, because the mean of its divisors is an integer number (3243733970400).

Almost surely, 2^{120640691486280} is an apocalyptic number.

120640691486280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120640691486280 is an abundant number, since it is smaller than the sum of its proper divisors (294557256724920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120640691486280 is a wasteful number, since it uses less digits than its factorization.

120640691486280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546083443 (or 546083439 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 120640691486280 in words is "one hundred twenty trillion, six hundred forty billion, six hundred ninety-one million, four hundred eighty-six thousand, two hundred eighty".