12620999797559 has 32 divisors (see below), whose sum is σ = 13854909772800. Its totient is φ = 11459237278720.

The previous prime is 12620999797543. The next prime is 12620999797573. The reversal of 12620999797559 is 95579799902621.

It is a cyclic number.

It is not a de Polignac number, because 12620999797559 - 2⁴ = 12620999797543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12620999797519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16339532 + ... + 17094510.

It is an arithmetic number, because the mean of its divisors is an integer number (432965930400).

Almost surely, 2^{12620999797559} is an apocalyptic number.

12620999797559 is a deficient number, since it is larger than the sum of its proper divisors (1233909975241).

12620999797559 is a wasteful number, since it uses less digits than its factorization.

12620999797559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755455.

The product of its (nonzero) digits is 1736040600, while the sum is 80.

The spelling of 12620999797559 in words is "twelve trillion, six hundred twenty billion, nine hundred ninety-nine million, seven hundred ninety-seven thousand, five hundred fifty-nine".