55717632 has 90 divisors (see below), whose sum is σ = 166201728. Its totient is φ = 18565632.

The previous prime is 55717631. The next prime is 55717657. The reversal of 55717632 is 23671755.

55717632 is a `hidden beast` number, since 5 + 5 + 7 + 17 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55717631) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19393 + ... + 22079.

Almost surely, 2^55717632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55717632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83100864).

55717632 is an abundant number, since it is smaller than the sum of its proper divisors (110484096).

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

55717632 is an equidigital number, since it uses as much as digits as its factorization.

55717632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 2692 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 55717632 is about 7464.4244252320. The cubic root of 55717632 is about 381.9421163540.

It can be divided in two parts, 5571 and 7632, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 55717632 in words is "fifty-five million, seven hundred seventeen thousand, six hundred thirty-two".