77794280480 has 96 divisors (see below), whose sum is σ = 211903703424. Its totient is φ = 26436243456.

The previous prime is 77794280441. The next prime is 77794280497. The reversal of 77794280480 is 8408249777.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180782 + ... + 433901.

It is an arithmetic number, because the mean of its divisors is an integer number (2207330244).

Almost surely, 2^77794280480 is an apocalyptic number.

77794280480 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77794280480 is an abundant number, since it is smaller than the sum of its proper divisors (134109422944).

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

77794280480 is a wasteful number, since it uses less digits than its factorization.

77794280480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614818 (or 614810 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 77794280480 in words is "seventy-seven billion, seven hundred ninety-four million, two hundred eighty thousand, four hundred eighty".