13021664360554 has 4 divisors (see below), whose sum is σ = 19532496540834. Its totient is φ = 6510832180276.

The previous prime is 13021664360543. The next prime is 13021664360557. The reversal of 13021664360554 is 45506346612031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7500231209025 + 5521433151529 = 2738655^2 + 2349773^2 .

It is a super-2 number, since 2×13021664360554² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13021664360557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255416090137 + ... + 3255416090140.

Almost surely, 2^{13021664360554} is an apocalyptic number.

13021664360554 is a deficient number, since it is larger than the sum of its proper divisors (6510832180280).

13021664360554 is an equidigital number, since it uses as much as digits as its factorization.

13021664360554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510832180279.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 13021664360554 in words is "thirteen trillion, twenty-one billion, six hundred sixty-four million, three hundred sixty thousand, five hundred fifty-four".