12720657874 has 8 divisors (see below), whose sum is σ = 19135041660. Its totient is φ = 6342310656.

The previous prime is 12720657821. The next prime is 12720657883. The reversal of 12720657874 is 47875602721.

It can be written as a sum of positive squares in 2 ways, for example, as 12256039849 + 464618025 = 110707^2 + 21555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9008259 + ... + 9009670.

Almost surely, 2^12720657874 is an apocalyptic number.

12720657874 is a deficient number, since it is larger than the sum of its proper divisors (6414383786).

12720657874 is a wasteful number, since it uses less digits than its factorization.

12720657874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18018284.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 12720657874 in words is "twelve billion, seven hundred twenty million, six hundred fifty-seven thousand, eight hundred seventy-four".