55777555548 has 72 divisors (see below), whose sum is σ = 165642452976. Its totient is φ = 15602112000.

The previous prime is 55777555511. The next prime is 55777555549. The reversal of 55777555548 is 84555577755.

55777555548 is a `hidden beast` number, since 5 + 5 + 7 + 7 + 75 + 5 + 554 + 8 = 666.

It is a super-2 number, since 2×55777555548² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55777555549) 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, 5412253 + ... + 5422548.

Almost surely, 2^55777555548 is an apocalyptic number.

It is an amenable number.

55777555548 is an abundant number, since it is smaller than the sum of its proper divisors (109864897428).

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

55777555548 is a wasteful number, since it uses less digits than its factorization.

55777555548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10834835 (or 10834830 counting only the distinct ones).

The product of its digits is 171500000, while the sum is 63.

The spelling of 55777555548 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred forty-eight".