55977648 has 40 divisors (see below), whose sum is σ = 152222400. Its totient is φ = 17676864.

The previous prime is 55977643. The next prime is 55977671. The reversal of 55977648 is 84677955.

It is a super-2 number, since 2×55977648² = 6266994151223808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55977648.

It is not an unprimeable number, because it can be changed into a prime (55977643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29778 + ... + 31601.

It is an arithmetic number, because the mean of its divisors is an integer number (3805560).

Almost surely, 2^55977648 is an apocalyptic number.

It is an amenable number.

55977648 is an abundant number, since it is smaller than the sum of its proper divisors (96244752).

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

55977648 is a wasteful number, since it uses less digits than its factorization.

55977648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61409 (or 61403 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 51.

The square root of 55977648 is about 7481.8211686728. The cubic root of 55977648 is about 382.5353275927.

The spelling of 55977648 in words is "fifty-five million, nine hundred seventy-seven thousand, six hundred forty-eight".