55540551132 has 144 divisors (see below), whose sum is σ = 156932455680. Its totient is φ = 16416691200.

The previous prime is 55540551103. The next prime is 55540551139. The reversal of 55540551132 is 23115504555.

55540551132 is a `hidden beast` number, since 5 + 55 + 40 + 551 + 13 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55540551139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15817257 + ... + 15820767.

It is an arithmetic number, because the mean of its divisors is an integer number (1089808720).

Almost surely, 2^55540551132 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 55540551132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78466227840).

55540551132 is an abundant number, since it is smaller than the sum of its proper divisors (101391904548).

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

55540551132 is a wasteful number, since it uses less digits than its factorization.

55540551132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504 (or 4499 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 55540551132 in words is "fifty-five billion, five hundred forty million, five hundred fifty-one thousand, one hundred thirty-two".