13681607091604 has 6 divisors (see below), whose sum is σ = 23942812410314. Its totient is φ = 6840803545800.

The previous prime is 13681607091541. The next prime is 13681607091617. The reversal of 13681607091604 is 40619070618631.

It can be written as a sum of positive squares in only one way, i.e., 7083592896004 + 6598014195600 = 2661502^2 + 2568660^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710200886447 + ... + 1710200886454.

Almost surely, 2^{13681607091604} is an apocalyptic number.

It is an amenable number.

13681607091604 is a deficient number, since it is larger than the sum of its proper divisors (10261205318710).

13681607091604 is a wasteful number, since it uses less digits than its factorization.

13681607091604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420401772905 (or 3420401772903 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 13681607091604 in words is "thirteen trillion, six hundred eighty-one billion, six hundred seven million, ninety-one thousand, six hundred four".