77932702648 has 64 divisors (see below), whose sum is σ = 160579065600. Its totient is φ = 35293547520.

The previous prime is 77932702621. The next prime is 77932702649. The reversal of 77932702648 is 84620723977.

It is a super-2 number, since 2×77932702648² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77932702649) 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 15 ways as a sum of consecutive naturals, for example, 9935208 + ... + 9943048.

It is an arithmetic number, because the mean of its divisors is an integer number (2509047900).

Almost surely, 2^77932702648 is an apocalyptic number.

It is an amenable number.

77932702648 is an abundant number, since it is smaller than the sum of its proper divisors (82646362952).

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

77932702648 is a wasteful number, since it uses less digits than its factorization.

77932702648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10732 (or 10728 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 55.

The spelling of 77932702648 in words is "seventy-seven billion, nine hundred thirty-two million, seven hundred two thousand, six hundred forty-eight".