2155557702660 has 96 divisors (see below), whose sum is σ = 6168035596800. Its totient is φ = 562332326400.

The previous prime is 2155557702559. The next prime is 2155557702667. The reversal of 2155557702660 is 662077555512.

It is not an unprimeable number, because it can be changed into a prime (2155557702667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1569391 + ... + 2602710.

It is an arithmetic number, because the mean of its divisors is an integer number (64250370800).

Almost surely, 2^{2155557702660} is an apocalyptic number.

2155557702660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155557702660 is an abundant number, since it is smaller than the sum of its proper divisors (4012477894140).

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

2155557702660 is a wasteful number, since it uses less digits than its factorization.

2155557702660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172301 (or 4172299 counting only the distinct ones).

The product of its (nonzero) digits is 4410000, while the sum is 51.

The spelling of 2155557702660 in words is "two trillion, one hundred fifty-five billion, five hundred fifty-seven million, seven hundred two thousand, six hundred sixty".