2155520618160 has 640 divisors, whose sum is σ = 8722421729280. Its totient is φ = 427325718528.

The previous prime is 2155520618057. The next prime is 2155520618183. The reversal of 2155520618160 is 618160255512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 238728526 + ... + 238737554.

It is an arithmetic number, because the mean of its divisors is an integer number (13628783952).

Almost surely, 2^{2155520618160} is an apocalyptic number.

2155520618160 is a gapful number since it is divisible by the number (20) 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 2155520618160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4361210864640).

2155520618160 is an abundant number, since it is smaller than the sum of its proper divisors (6566901111120).

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

2155520618160 is a wasteful number, since it uses less digits than its factorization.

2155520618160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9725 (or 9719 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 42.

The spelling of 2155520618160 in words is "two trillion, one hundred fifty-five billion, five hundred twenty million, six hundred eighteen thousand, one hundred sixty".