12620042691 has 8 divisors (see below), whose sum is σ = 16839762624. Its totient is φ = 8406842280.

The previous prime is 12620042663. The next prime is 12620042693. The reversal of 12620042691 is 19624002621.

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

It is not a de Polignac number, because 12620042691 - 2¹³ = 12620034499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12620042693) 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, 1625361 + ... + 1633106.

It is an arithmetic number, because the mean of its divisors is an integer number (2104970328).

Almost surely, 2^12620042691 is an apocalyptic number.

12620042691 is a deficient number, since it is larger than the sum of its proper divisors (4219719933).

12620042691 is a wasteful number, since it uses less digits than its factorization.

12620042691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259761.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 12620042691 in words is "twelve billion, six hundred twenty million, forty-two thousand, six hundred ninety-one".