12609156720 has 40 divisors (see below), whose sum is σ = 39088386576. Its totient is φ = 3362441728.

The previous prime is 12609156719. The next prime is 12609156731. The reversal of 12609156720 is 2765190621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×12609156720³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26268837 + ... + 26269316.

Almost surely, 2^12609156720 is an apocalyptic number.

12609156720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12609156720 is an abundant number, since it is smaller than the sum of its proper divisors (26479229856).

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

12609156720 is a wasteful number, since it uses less digits than its factorization.

12609156720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52538169 (or 52538163 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 12609156720 in words is "twelve billion, six hundred nine million, one hundred fifty-six thousand, seven hundred twenty".