12915638932 has 48 divisors (see below), whose sum is σ = 26390649600. Its totient is φ = 5528512416.

The previous prime is 12915638929. The next prime is 12915638933. The reversal of 12915638932 is 23983651921.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915638933) 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, 1211658 + ... + 1222270.

It is an arithmetic number, because the mean of its divisors is an integer number (549805200).

Almost surely, 2^12915638932 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 12915638932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13195324800).

12915638932 is an abundant number, since it is smaller than the sum of its proper divisors (13475010668).

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

12915638932 is a wasteful number, since it uses less digits than its factorization.

12915638932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11525 (or 11509 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The spelling of 12915638932 in words is "twelve billion, nine hundred fifteen million, six hundred thirty-eight thousand, nine hundred thirty-two".