55776725 has 12 divisors (see below), whose sum is σ = 72170976. Its totient is φ = 42680880.

The previous prime is 55776713. The next prime is 55776737. The reversal of 55776725 is 52767755.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55776713) and next prime (55776737).

It is not a de Polignac number, because 55776725 - 2⁴ = 55776709 is a prime.

It is a super-2 number, since 2×55776725² = 6222086103451250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47927 + ... + 49076.

It is an arithmetic number, because the mean of its divisors is an integer number (6014248).

Almost surely, 2^55776725 is an apocalyptic number.

It is an amenable number.

55776725 is a deficient number, since it is larger than the sum of its proper divisors (16394251).

55776725 is a wasteful number, since it uses less digits than its factorization.

55776725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97036 (or 97031 counting only the distinct ones).

The product of its digits is 514500, while the sum is 44.

The square root of 55776725 is about 7468.3816854791. The cubic root of 55776725 is about 382.0770953557.

The spelling of 55776725 in words is "fifty-five million, seven hundred seventy-six thousand, seven hundred twenty-five".