13661995081048 has 16 divisors (see below), whose sum is σ = 25998572729880. Its totient is φ = 6729042353088.

The previous prime is 13661995081027. The next prime is 13661995081051. The reversal of 13661995081048 is 84018059916631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12744397861 + ... + 12744398932.

Almost surely, 2^{13661995081048} is an apocalyptic number.

It is an amenable number.

13661995081048 is a deficient number, since it is larger than the sum of its proper divisors (12336577648832).

13661995081048 is a wasteful number, since it uses less digits than its factorization.

13661995081048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25488796866 (or 25488796862 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 13661995081048 in words is "thirteen trillion, six hundred sixty-one billion, nine hundred ninety-five million, eighty-one thousand, forty-eight".