55615736 has 128 divisors (see below), whose sum is σ = 131328000. Its totient is φ = 21772800.

The previous prime is 55615733. The next prime is 55615739. The reversal of 55615736 is 63751655.

It is an interprime number because it is at equal distance from previous prime (55615733) and next prime (55615739).

It is a super-2 number, since 2×55615736² = 6186220181643392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 55615736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55615733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1503110 + ... + 1503146.

It is an arithmetic number, because the mean of its divisors is an integer number (1026000).

Almost surely, 2^55615736 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 55615736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65664000).

55615736 is an abundant number, since it is smaller than the sum of its proper divisors (75712264).

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

55615736 is a wasteful number, since it uses less digits than its factorization.

55615736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 129 counting only the distinct ones).

The product of its digits is 94500, while the sum is 38.

The square root of 55615736 is about 7457.5958592565. The cubic root of 55615736 is about 381.7091432886.

The spelling of 55615736 in words is "fifty-five million, six hundred fifteen thousand, seven hundred thirty-six".