15708468138 has 64 divisors (see below), whose sum is σ = 34720358400. Its totient is φ = 4698207360.

The previous prime is 15708468137. The next prime is 15708468203. The reversal of 15708468138 is 83186480751.

It is a happy number.

It is a super-2 number, since 2×15708468138² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15708468133) 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, 3774903 + ... + 3779061.

It is an arithmetic number, because the mean of its divisors is an integer number (542505600).

Almost surely, 2^15708468138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15708468138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17360179200).

15708468138 is an abundant number, since it is smaller than the sum of its proper divisors (19011890262).

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

15708468138 is a wasteful number, since it uses less digits than its factorization.

15708468138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 15708468138 in words is "fifteen billion, seven hundred eight million, four hundred sixty-eight thousand, one hundred thirty-eight".