55708400280 has 512 divisors, whose sum is σ = 199671091200. Its totient is φ = 12313534464.

The previous prime is 55708400263. The next prime is 55708400281. The reversal of 55708400280 is 8200480755.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55708400281) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 38498517 + ... + 38499963.

It is an arithmetic number, because the mean of its divisors is an integer number (389982600).

Almost surely, 2^55708400280 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 55708400280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99835545600).

55708400280 is an abundant number, since it is smaller than the sum of its proper divisors (143962690920).

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

55708400280 is a wasteful number, since it uses less digits than its factorization.

55708400280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The spelling of 55708400280 in words is "fifty-five billion, seven hundred eight million, four hundred thousand, two hundred eighty".