13261666362436 has 24 divisors (see below), whose sum is σ = 24008483298240. Its totient is φ = 6402105309600.

The previous prime is 13261666362367. The next prime is 13261666362443. The reversal of 13261666362436 is 63426366616231.

It is a super-2 number, since 2×13261666362436² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9436321 + ... + 10750231.

It is an arithmetic number, because the mean of its divisors is an integer number (1000353470760).

Almost surely, 2^{13261666362436} is an apocalyptic number.

It is an amenable number.

13261666362436 is a deficient number, since it is larger than the sum of its proper divisors (10746816935804).

13261666362436 is a wasteful number, since it uses less digits than its factorization.

13261666362436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400955 (or 1400953 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 55.

The spelling of 13261666362436 in words is "thirteen trillion, two hundred sixty-one billion, six hundred sixty-six million, three hundred sixty-two thousand, four hundred thirty-six".