55207798840 has 32 divisors (see below), whose sum is σ = 129618312480. Its totient is φ = 21122983552.

The previous prime is 55207798819. The next prime is 55207798871. The reversal of 55207798840 is 4889770255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30003319 + ... + 30005158.

It is an arithmetic number, because the mean of its divisors is an integer number (4050572265).

Almost surely, 2^55207798840 is an apocalyptic number.

It is an amenable number.

55207798840 is an abundant number, since it is smaller than the sum of its proper divisors (74410513640).

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

55207798840 is a wasteful number, since it uses less digits than its factorization.

55207798840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60008511 (or 60008507 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 55207798840 in words is "fifty-five billion, two hundred seven million, seven hundred ninety-eight thousand, eight hundred forty".