55776501 has 24 divisors (see below), whose sum is σ = 90271584. Its totient is φ = 32888160.

The previous prime is 55776493. The next prime is 55776521. The reversal of 55776501 is 10567755.

It is not a de Polignac number, because 55776501 - 2³ = 55776493 is a prime.

It is a super-2 number, since 2×55776501² = 6222036127606002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55776521) 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, 3951 + ... + 11276.

It is an arithmetic number, because the mean of its divisors is an integer number (3761316).

Almost surely, 2^55776501 is an apocalyptic number.

It is an amenable number.

55776501 is a deficient number, since it is larger than the sum of its proper divisors (34495083).

55776501 is a wasteful number, since it uses less digits than its factorization.

55776501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15281 (or 15278 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 55776501 is about 7468.3666889086. The cubic root of 55776501 is about 382.0765838796.

The spelling of 55776501 in words is "fifty-five million, seven hundred seventy-six thousand, five hundred one".