77807993420922 has 64 divisors (see below), whose sum is σ = 169330837820544. Its totient is φ = 23735491706880.

The previous prime is 77807993420909. The next prime is 77807993420953. The reversal of 77807993420922 is 22902439970877.

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, 632743 + ... + 12490650.

It is an arithmetic number, because the mean of its divisors is an integer number (2645794340946).

Almost surely, 2^{77807993420922} is an apocalyptic number.

77807993420922 is an abundant number, since it is smaller than the sum of its proper divisors (91522844399622).

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

77807993420922 is a wasteful number, since it uses less digits than its factorization.

77807993420922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13125023.

The product of its (nonzero) digits is 192036096, while the sum is 69.

The spelling of 77807993420922 in words is "seventy-seven trillion, eight hundred seven billion, nine hundred ninety-three million, four hundred twenty thousand, nine hundred twenty-two".