2515121660 has 12 divisors (see below), whose sum is σ = 5281755528. Its totient is φ = 1006048656.

The previous prime is 2515121641. The next prime is 2515121689. The reversal of 2515121660 is 661215152.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62878022 + ... + 62878061.

It is an arithmetic number, because the mean of its divisors is an integer number (440146294).

Almost surely, 2^2515121660 is an apocalyptic number.

2515121660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2515121660 is an abundant number, since it is smaller than the sum of its proper divisors (2766633868).

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

2515121660 is a wasteful number, since it uses less digits than its factorization.

2515121660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125756092 (or 125756090 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2515121660 is about 50150.9886243532. The cubic root of 2515121660 is about 1359.9397428608.

The spelling of 2515121660 in words is "two billion, five hundred fifteen million, one hundred twenty-one thousand, six hundred sixty".