55615896 has 192 divisors, whose sum is σ = 184154880. Its totient is φ = 15396480.

The previous prime is 55615883. The next prime is 55615913. The reversal of 55615896 is 69851655.

It is a happy number.

55615896 is a `hidden beast` number, since 5 + 5 + 61 + 589 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 830055 + ... + 830121.

It is an arithmetic number, because the mean of its divisors is an integer number (959140).

Almost surely, 2^55615896 is an apocalyptic number.

55615896 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55615896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92077440).

55615896 is an abundant number, since it is smaller than the sum of its proper divisors (128538984).

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

55615896 is a wasteful number, since it uses less digits than its factorization.

55615896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 140 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 55615896 is about 7457.6065865665. The cubic root of 55615896 is about 381.7095093325.

The spelling of 55615896 in words is "fifty-five million, six hundred fifteen thousand, eight hundred ninety-six".