55840197636 has 144 divisors (see below), whose sum is σ = 157533667200. Its totient is φ = 17230993920.

The previous prime is 55840197613. The next prime is 55840197661. The reversal of 55840197636 is 63679104855.

55840197636 is a `hidden beast` number, since 558 + 4 + 0 + 19 + 76 + 3 + 6 = 666.

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

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, 980265 + ... + 1035663.

It is an arithmetic number, because the mean of its divisors is an integer number (1093983800).

Almost surely, 2^55840197636 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 55840197636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78766833600).

55840197636 is an abundant number, since it is smaller than the sum of its proper divisors (101693469564).

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

55840197636 is a wasteful number, since it uses less digits than its factorization.

55840197636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55496 (or 55482 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 55840197636 in words is "fifty-five billion, eight hundred forty million, one hundred ninety-seven thousand, six hundred thirty-six".