1320240779172 has 96 divisors (see below), whose sum is σ = 3912363786240. Its totient is φ = 377159652000.

The previous prime is 1320240779153. The next prime is 1320240779191. The reversal of 1320240779172 is 2719770420231.

1320240779172 is a `hidden beast` number, since 1 + 3 + 2 + 0 + 2 + 407 + 79 + 172 = 666.

It is an interprime number because it is at equal distance from previous prime (1320240779153) and next prime (1320240779191).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5543547 + ... + 5776797.

It is an arithmetic number, because the mean of its divisors is an integer number (40753789440).

Almost surely, 2^{1320240779172} is an apocalyptic number.

1320240779172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1320240779172 is an abundant number, since it is smaller than the sum of its proper divisors (2592123007068).

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

1320240779172 is a wasteful number, since it uses less digits than its factorization.

1320240779172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240758 (or 240750 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 1320240779172 in words is "one trillion, three hundred twenty billion, two hundred forty million, seven hundred seventy-nine thousand, one hundred seventy-two".