78764490921120 has 96 divisors (see below), whose sum is σ = 248112557626752. Its totient is φ = 21003490808832.

The previous prime is 78764490920989. The next prime is 78764490921131. The reversal of 78764490921120 is 2112909446787.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26108989 + ... + 28969091.

It is an arithmetic number, because the mean of its divisors is an integer number (2584505808612).

Almost surely, 2^{78764490921120} is an apocalyptic number.

It is an amenable number.

78764490921120 is an abundant number, since it is smaller than the sum of its proper divisors (169348066705632).

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

78764490921120 is a wasteful number, since it uses less digits than its factorization.

78764490921120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917494 (or 2917486 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 78764490921120 in words is "seventy-eight trillion, seven hundred sixty-four billion, four hundred ninety million, nine hundred twenty-one thousand, one hundred twenty".