55101055581 has 36 divisors (see below), whose sum is σ = 94018612896. Its totient is φ = 30825756000.

The previous prime is 55101055579. The next prime is 55101055589. The reversal of 55101055581 is 18555010155.

It is a happy number.

55101055581 is a `hidden beast` number, since 5 + 5 + 10 + 10 + 55 + 581 = 666.

55101055581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55101055581 - 2¹ = 55101055579 is a prime.

It is a super-2 number, since 2×55101055581² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55101055589) 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, 1629945 + ... + 1663406.

It is an arithmetic number, because the mean of its divisors is an integer number (2611628136).

Almost surely, 2^55101055581 is an apocalyptic number.

It is an amenable number.

55101055581 is a deficient number, since it is larger than the sum of its proper divisors (38917557315).

55101055581 is a wasteful number, since it uses less digits than its factorization.

55101055581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293394 (or 3293378 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 36.

The spelling of 55101055581 in words is "fifty-five billion, one hundred one million, fifty-five thousand, five hundred eighty-one".