12991617130 has 16 divisors (see below), whose sum is σ = 23768271144. Its totient is φ = 5111455680.

The previous prime is 12991617127. The next prime is 12991617131. The reversal of 12991617130 is 3171619921.

It can be written as a sum of positive squares in 4 ways, for example, as 5346388161 + 7645228969 = 73119^2 + 87437^2 .

It is not an unprimeable number, because it can be changed into a prime (12991617131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10648257 + ... + 10649476.

Almost surely, 2^12991617130 is an apocalyptic number.

12991617130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12991617130 is a deficient number, since it is larger than the sum of its proper divisors (10776654014).

12991617130 is a wasteful number, since it uses less digits than its factorization.

12991617130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21297801.

The product of its (nonzero) digits is 20412, while the sum is 40.

The spelling of 12991617130 in words is "twelve billion, nine hundred ninety-one million, six hundred seventeen thousand, one hundred thirty".