12731878542152 has 128 divisors (see below), whose sum is σ = 30318193140480. Its totient is φ = 4909330483200.

The previous prime is 12731878542137. The next prime is 12731878542193. The reversal of 12731878542152 is 25124587813721.

It is a super-2 number, since 2×12731878542152² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6349502 + ... + 8110482.

It is an arithmetic number, because the mean of its divisors is an integer number (236860883910).

Almost surely, 2^{12731878542152} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12731878542152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15159096570240).

12731878542152 is an abundant number, since it is smaller than the sum of its proper divisors (17586314598328).

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

12731878542152 is a wasteful number, since it uses less digits than its factorization.

12731878542152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761124 (or 1761098 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 56.

The spelling of 12731878542152 in words is "twelve trillion, seven hundred thirty-one billion, eight hundred seventy-eight million, five hundred forty-two thousand, one hundred fifty-two".