55618063872 has 360 divisors, whose sum is σ = 183167912664. Its totient is φ = 14950268928.

The previous prime is 55618063841. The next prime is 55618063877. The reversal of 55618063872 is 27836081655.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55618063877) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21750018 + ... + 21752574.

Almost surely, 2^55618063872 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 55618063872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91583956332).

55618063872 is an abundant number, since it is smaller than the sum of its proper divisors (127549848792).

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

55618063872 is a wasteful number, since it uses less digits than its factorization.

55618063872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626 (or 2586 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 55618063872 in words is "fifty-five billion, six hundred eighteen million, sixty-three thousand, eight hundred seventy-two".