12915415135992 has 128 divisors (see below), whose sum is σ = 34580284416000. Its totient is φ = 4007535315840.

The previous prime is 12915415135939. The next prime is 12915415135993. The reversal of 12915415135992 is 29953151451921.

It is a super-2 number, since 2×12915415135992² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915415135993) 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, 57543267 + ... + 57767277.

It is an arithmetic number, because the mean of its divisors is an integer number (270158472000).

Almost surely, 2^{12915415135992} is an apocalyptic number.

12915415135992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12915415135992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17290142208000).

12915415135992 is an abundant number, since it is smaller than the sum of its proper divisors (21664869280008).

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

12915415135992 is a wasteful number, since it uses less digits than its factorization.

12915415135992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226241 (or 226237 counting only the distinct ones).

The product of its digits is 4374000, while the sum is 57.

The spelling of 12915415135992 in words is "twelve trillion, nine hundred fifteen billion, four hundred fifteen million, one hundred thirty-five thousand, nine hundred ninety-two".