55161826380 has 144 divisors (see below), whose sum is σ = 176224339200. Its totient is φ = 13928215680.

The previous prime is 55161826351. The next prime is 55161826411. The reversal of 55161826380 is 8362816155.

55161826380 is a `hidden beast` number, since 5 + 5 + 1 + 6 + 1 + 8 + 2 + 638 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 9542331 + ... + 9548109.

Almost surely, 2^55161826380 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 55161826380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88112169600).

55161826380 is an abundant number, since it is smaller than the sum of its proper divisors (121062512820).

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

55161826380 is a wasteful number, since it uses less digits than its factorization.

55161826380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8604 (or 8599 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 55161826380 in words is "fifty-five billion, one hundred sixty-one million, eight hundred twenty-six thousand, three hundred eighty".