77147380755 has 24 divisors (see below), whose sum is σ = 135553942368. Its totient is φ = 40581634176.

The previous prime is 77147380729. The next prime is 77147380769. The reversal of 77147380755 is 55708374177.

77147380755 is a `hidden beast` number, since 77 + 147 + 380 + 7 + 55 = 666.

It is not a de Polignac number, because 77147380755 - 2³³ = 68557446163 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11739087 + ... + 11745656.

It is an arithmetic number, because the mean of its divisors is an integer number (5648080932).

Almost surely, 2^77147380755 is an apocalyptic number.

77147380755 is a deficient number, since it is larger than the sum of its proper divisors (58406561613).

77147380755 is a wasteful number, since it uses less digits than its factorization.

77147380755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23484827 (or 23484824 counting only the distinct ones).

The product of its (nonzero) digits is 5762400, while the sum is 54.

The spelling of 77147380755 in words is "seventy-seven billion, one hundred forty-seven million, three hundred eighty thousand, seven hundred fifty-five".