12155015660 has 12 divisors (see below), whose sum is σ = 25525532928. Its totient is φ = 4862006256.

The previous prime is 12155015633. The next prime is 12155015693. The reversal of 12155015660 is 6651055121.

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, 303875372 + ... + 303875411.

It is an arithmetic number, because the mean of its divisors is an integer number (2127127744).

Almost surely, 2^12155015660 is an apocalyptic number.

12155015660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155015660 is an abundant number, since it is smaller than the sum of its proper divisors (13370517268).

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

12155015660 is a wasteful number, since it uses less digits than its factorization.

12155015660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607750792 (or 607750790 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 12155015660 in words is "twelve billion, one hundred fifty-five million, fifteen thousand, six hundred sixty".