55597099031784 has 320 divisors, whose sum is σ = 166333128192000. Its totient is φ = 17299561910400.

The previous prime is 55597099031779. The next prime is 55597099031797. The reversal of 55597099031784 is 48713099079555.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 387226809 + ... + 387370359.

It is an arithmetic number, because the mean of its divisors is an integer number (519791025600).

Almost surely, 2^{55597099031784} is an apocalyptic number.

55597099031784 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55597099031784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83166564096000).

55597099031784 is an abundant number, since it is smaller than the sum of its proper divisors (110736029160216).

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

55597099031784 is a wasteful number, since it uses less digits than its factorization.

55597099031784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144050 (or 144037 counting only the distinct ones).

The product of its (nonzero) digits is 428652000, while the sum is 72.

The spelling of 55597099031784 in words is "fifty-five trillion, five hundred ninety-seven billion, ninety-nine million, thirty-one thousand, seven hundred eighty-four".