55840219812 has 72 divisors (see below), whose sum is σ = 158618625984. Its totient is φ = 16434576576.

The previous prime is 55840219783. The next prime is 55840219819. The reversal of 55840219812 is 21891204855.

55840219812 is a `hidden beast` number, since 5 + 58 + 402 + 198 + 1 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (55840219819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2583078 + ... + 2604605.

It is an arithmetic number, because the mean of its divisors is an integer number (2203036472).

Almost surely, 2^55840219812 is an apocalyptic number.

55840219812 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

55840219812 is an abundant number, since it is smaller than the sum of its proper divisors (102778406172).

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

55840219812 is a wasteful number, since it uses less digits than its factorization.

55840219812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187729 (or 5187724 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 55840219812 in words is "fifty-five billion, eight hundred forty million, two hundred nineteen thousand, eight hundred twelve".