77677501072 has 10 divisors (see below), whose sum is σ = 150500158358. Its totient is φ = 38838750528.

The previous prime is 77677501007. The next prime is 77677501091. The reversal of 77677501072 is 27010577677.

It can be written as a sum of positive squares in only one way, i.e., 75876007936 + 1801493136 = 275456^2 + 42444^2 .

It is a super-2 number, since 2×77677501072² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2427421893 + ... + 2427421924.

Almost surely, 2^77677501072 is an apocalyptic number.

It is an amenable number.

77677501072 is a deficient number, since it is larger than the sum of its proper divisors (72822657286).

77677501072 is a wasteful number, since it uses less digits than its factorization.

77677501072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4854843825 (or 4854843819 counting only the distinct ones).

The product of its (nonzero) digits is 1008420, while the sum is 49.

The spelling of 77677501072 in words is "seventy-seven billion, six hundred seventy-seven million, five hundred one thousand, seventy-two".