154777947864 has 32 divisors (see below), whose sum is σ = 400287798000. Its totient is φ = 49813592192.

The previous prime is 154777947851. The next prime is 154777947871. The reversal of 154777947864 is 468749777451.

It is a super-2 number, since 2×154777947864² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111190359 + ... + 111191750.

Almost surely, 2^154777947864 is an apocalyptic number.

It is an amenable number.

154777947864 is an abundant number, since it is smaller than the sum of its proper divisors (245509850136).

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

154777947864 is a wasteful number, since it uses less digits than its factorization.

154777947864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222382147 (or 222382143 counting only the distinct ones).

The product of its digits is 331914240, while the sum is 69.

The spelling of 154777947864 in words is "one hundred fifty-four billion, seven hundred seventy-seven million, nine hundred forty-seven thousand, eight hundred sixty-four".