12015780639297 has 16 divisors (see below), whose sum is σ = 16964830247040. Its totient is φ = 7538702130432.

The previous prime is 12015780639287. The next prime is 12015780639299. The reversal of 12015780639297 is 79293608751021.

It is a happy number.

It is not a de Polignac number, because 12015780639297 - 2²³ = 12015772250689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12015780639297.

It is not an unprimeable number, because it can be changed into a prime (12015780639299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8914522 + ... + 10173507.

It is an arithmetic number, because the mean of its divisors is an integer number (1060301890440).

Almost surely, 2^{12015780639297} is an apocalyptic number.

12015780639297 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12015780639297 is a deficient number, since it is larger than the sum of its proper divisors (4949049607743).

12015780639297 is a wasteful number, since it uses less digits than its factorization.

12015780639297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19100392.

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 12015780639297 in words is "twelve trillion, fifteen billion, seven hundred eighty million, six hundred thirty-nine thousand, two hundred ninety-seven".