77039677764 has 72 divisors (see below), whose sum is σ = 225693756288. Its totient is φ = 21701312640.

The previous prime is 77039677763. The next prime is 77039677837. The reversal of 77039677764 is 46777693077.

It is a super-2 number, since 2×77039677764² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (77039677763) 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 23 ways as a sum of consecutive naturals, for example, 2135017 + ... + 2170800.

It is an arithmetic number, because the mean of its divisors is an integer number (3134635504).

Almost surely, 2^77039677764 is an apocalyptic number.

It is an amenable number.

77039677764 is an abundant number, since it is smaller than the sum of its proper divisors (148654078524).

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

77039677764 is a wasteful number, since it uses less digits than its factorization.

77039677764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305905 (or 4305900 counting only the distinct ones).

The product of its (nonzero) digits is 65345616, while the sum is 63.

The spelling of 77039677764 in words is "seventy-seven billion, thirty-nine million, six hundred seventy-seven thousand, seven hundred sixty-four".