13620016643491 has 2 divisors, whose sum is σ = 13620016643492. Its totient is φ = 13620016643490.

The previous prime is 13620016643437. The next prime is 13620016643581. The reversal of 13620016643491 is 19434661002631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13620016643491 - 2¹⁵ = 13620016610723 is a prime.

It is not a weakly prime, because it can be changed into another prime (13620016643291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810008321745 + 6810008321746.

It is an arithmetic number, because the mean of its divisors is an integer number (6810008321746).

Almost surely, 2^{13620016643491} is an apocalyptic number.

13620016643491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13620016643491 is an equidigital number, since it uses as much as digits as its factorization.

13620016643491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 13620016643491 in words is "thirteen trillion, six hundred twenty billion, sixteen million, six hundred forty-three thousand, four hundred ninety-one".