77954534620 has 24 divisors (see below), whose sum is σ = 173334201264. Its totient is φ = 29347589376.

The previous prime is 77954534597. The next prime is 77954534627. The reversal of 77954534620 is 2643545977.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77954534627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114638682 + ... + 114639361.

It is an arithmetic number, because the mean of its divisors is an integer number (7222258386).

Almost surely, 2^77954534620 is an apocalyptic number.

It is an amenable number.

77954534620 is an abundant number, since it is smaller than the sum of its proper divisors (95379666644).

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

77954534620 is a wasteful number, since it uses less digits than its factorization.

77954534620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229278069 (or 229278067 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 77954534620 in words is "seventy-seven billion, nine hundred fifty-four million, five hundred thirty-four thousand, six hundred twenty".