2155515410000 has 100 divisors (see below), whose sum is σ = 5329756082112. Its totient is φ = 843861168000.

The previous prime is 2155515409979. The next prime is 2155515410003. The reversal of 2155515410000 is 145155512.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155515410003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1823102 + ... + 2763101.

Almost surely, 2^{2155515410000} is an apocalyptic number.

2155515410000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155515410000 is an abundant number, since it is smaller than the sum of its proper divisors (3174240672112).

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

2155515410000 is an equidigital number, since it uses as much as digits as its factorization.

2155515410000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586278 (or 4586257 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 29.

The spelling of 2155515410000 in words is "two trillion, one hundred fifty-five billion, five hundred fifteen million, four hundred ten thousand".