55856637 has 48 divisors (see below), whose sum is σ = 90155520. Its totient is φ = 33177600.

The previous prime is 55856629. The next prime is 55856653. The reversal of 55856637 is 73665855.

55856637 is a `hidden beast` number, since 5 + 5 + 8 + 5 + 6 + 637 = 666.

It is not a de Polignac number, because 55856637 - 2³ = 55856629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55856592 and 55856601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55856617) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217213 + ... + 217469.

It is an arithmetic number, because the mean of its divisors is an integer number (1878240).

Almost surely, 2^55856637 is an apocalyptic number.

55856637 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55856637 is a deficient number, since it is larger than the sum of its proper divisors (34298883).

55856637 is a wasteful number, since it uses less digits than its factorization.

55856637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 55856637 is about 7473.7297917439. The cubic root of 55856637 is about 382.2594771347.

The spelling of 55856637 in words is "fifty-five million, eight hundred fifty-six thousand, six hundred thirty-seven".