12730015922 has 90 divisors (see below), whose sum is σ = 23184943623. Its totient is φ = 5238739584.

The previous prime is 12730015889. The next prime is 12730015927. The reversal of 12730015922 is 22951003721.

It can be written as a sum of positive squares in 5 ways, for example, as 5160841921 + 7569174001 = 71839^2 + 87001^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=79781.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12730015927) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 670000829 + ... + 670000847.

Almost surely, 2^12730015922 is an apocalyptic number.

12730015922 is a deficient number, since it is larger than the sum of its proper divisors (10454927701).

12730015922 is an frugal number, since it uses more digits than its factorization.

12730015922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

Multiplying 12730015922 by its sum of digits (32), we get a square (407360509504 = 638248²).

The spelling of 12730015922 in words is "twelve billion, seven hundred thirty million, fifteen thousand, nine hundred twenty-two".