55887620436 has 192 divisors, whose sum is σ = 152153702400. Its totient is φ = 17721908352.

The previous prime is 55887620423. The next prime is 55887620441. The reversal of 55887620436 is 63402678855.

55887620436 is a `hidden beast` number, since 5 + 5 + 8 + 8 + 7 + 620 + 4 + 3 + 6 = 666.

It is a super-2 number, since 2×55887620436² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52574841 + ... + 52575903.

It is an arithmetic number, because the mean of its divisors is an integer number (792467200).

Almost surely, 2^55887620436 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 55887620436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76076851200).

55887620436 is an abundant number, since it is smaller than the sum of its proper divisors (96266081964).

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

55887620436 is a wasteful number, since it uses less digits than its factorization.

55887620436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 55887620436 in words is "fifty-five billion, eight hundred eighty-seven million, six hundred twenty thousand, four hundred thirty-six".