77422321025 has 48 divisors (see below), whose sum is σ = 110921281536. Its totient is φ = 52510187520.

The previous prime is 77422320973. The next prime is 77422321027. The reversal of 77422321025 is 52012322477.

It is not a de Polignac number, because 77422321025 - 2⁶ = 77422320961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77422321027) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 7484657 + ... + 7494993.

It is an arithmetic number, because the mean of its divisors is an integer number (2310860032).

Almost surely, 2^77422321025 is an apocalyptic number.

It is an amenable number.

77422321025 is a deficient number, since it is larger than the sum of its proper divisors (33498960511).

77422321025 is a wasteful number, since it uses less digits than its factorization.

77422321025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10818 (or 10813 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The spelling of 77422321025 in words is "seventy-seven billion, four hundred twenty-two million, three hundred twenty-one thousand, twenty-five".