2155601236480 has 80 divisors (see below), whose sum is σ = 5346611332920. Its totient is φ = 832508035072.

The previous prime is 2155601236471. The next prime is 2155601236487. The reversal of 2155601236480 is 846321065512.

It can be written as a sum of positive squares in 4 ways, for example, as 1340148891904 + 815452344576 = 1157648^2 + 903024^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2155601236487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14443549 + ... + 14592028.

Almost surely, 2^{2155601236480} is an apocalyptic number.

2155601236480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155601236480 is an abundant number, since it is smaller than the sum of its proper divisors (3191010096440).

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

2155601236480 is an equidigital number, since it uses as much as digits as its factorization.

2155601236480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29035629 (or 29035613 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 2155601236480 in words is "two trillion, one hundred fifty-five billion, six hundred one million, two hundred thirty-six thousand, four hundred eighty".