13220776555613 has 4 divisors (see below), whose sum is σ = 14422665333408. Its totient is φ = 12018887777820.

The previous prime is 13220776555603. The next prime is 13220776555631. The reversal of 13220776555613 is 31655567702231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13220776555613 - 2¹⁰ = 13220776554589 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 (13220776555603) 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, 600944388881 + ... + 600944388902.

It is an arithmetic number, because the mean of its divisors is an integer number (3605666333352).

Almost surely, 2^{13220776555613} is an apocalyptic number.

It is an amenable number.

13220776555613 is a deficient number, since it is larger than the sum of its proper divisors (1201888777795).

13220776555613 is a wasteful number, since it uses less digits than its factorization.

13220776555613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201888777794.

The product of its (nonzero) digits is 7938000, while the sum is 53.

The spelling of 13220776555613 in words is "thirteen trillion, two hundred twenty billion, seven hundred seventy-six million, five hundred fifty-five thousand, six hundred thirteen".