55816031200920 has 512 divisors, whose sum is σ = 179873287372800. Its totient is φ = 13814677094400.

The previous prime is 55816031200889. The next prime is 55816031200921. The reversal of 55816031200920 is 2900213061855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55816031200921) 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, 26821734280 + ... + 26821736360.

It is an arithmetic number, because the mean of its divisors is an integer number (351315014400).

Almost surely, 2^{55816031200920} 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 55816031200920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89936643686400).

55816031200920 is an abundant number, since it is smaller than the sum of its proper divisors (124057256171880).

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

55816031200920 is a wasteful number, since it uses less digits than its factorization.

55816031200920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151 (or 3147 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 55816031200920 in words is "fifty-five trillion, eight hundred sixteen billion, thirty-one million, two hundred thousand, nine hundred twenty".