12616406651 has 4 divisors (see below), whose sum is σ = 12627702672. Its totient is φ = 12605110632.

The previous prime is 12616406633. The next prime is 12616406653. The reversal of 12616406651 is 15660461621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15660461621 = 7 ⋅2237208803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12616406651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12616406653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5646335 + ... + 5648568.

It is an arithmetic number, because the mean of its divisors is an integer number (3156925668).

Almost surely, 2^12616406651 is an apocalyptic number.

12616406651 is a deficient number, since it is larger than the sum of its proper divisors (11296021).

12616406651 is a wasteful number, since it uses less digits than its factorization.

12616406651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11296020.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 12616406651 in words is "twelve billion, six hundred sixteen million, four hundred six thousand, six hundred fifty-one".