13621773479 has 2 divisors, whose sum is σ = 13621773480. Its totient is φ = 13621773478.

The previous prime is 13621773469. The next prime is 13621773509. The reversal of 13621773479 is 97437712631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13621773479 - 2⁸ = 13621773223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13621773469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810886739 + 6810886740.

It is an arithmetic number, because the mean of its divisors is an integer number (6810886740).

Almost surely, 2^13621773479 is an apocalyptic number.

13621773479 is a deficient number, since it is larger than the sum of its proper divisors (1).

13621773479 is an equidigital number, since it uses as much as digits as its factorization.

13621773479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The spelling of 13621773479 in words is "thirteen billion, six hundred twenty-one million, seven hundred seventy-three thousand, four hundred seventy-nine".