155072056779 has 24 divisors (see below), whose sum is σ = 224583840000. Its totient is φ = 103108981248.

The previous prime is 155072056771. The next prime is 155072056793. The reversal of 155072056779 is 977650270551.

155072056779 is a `hidden beast` number, since 1 + 5 + 5 + 0 + 7 + 2 + 0 + 567 + 79 = 666.

It is not a de Polignac number, because 155072056779 - 2³ = 155072056771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155072056771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6248854 + ... + 6273620.

It is an arithmetic number, because the mean of its divisors is an integer number (9357660000).

Almost surely, 2^155072056779 is an apocalyptic number.

155072056779 is a deficient number, since it is larger than the sum of its proper divisors (69511783221).

155072056779 is a wasteful number, since it uses less digits than its factorization.

155072056779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26579 (or 26576 counting only the distinct ones).

The product of its (nonzero) digits is 4630500, while the sum is 54.

The spelling of 155072056779 in words is "one hundred fifty-five billion, seventy-two million, fifty-six thousand, seven hundred seventy-nine".