13161315156240 has 80 divisors (see below), whose sum is σ = 40818958776576. Its totient is φ = 3508059801600.

The previous prime is 13161315156229. The next prime is 13161315156307. The reversal of 13161315156240 is 4265151316131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×13161315156240² (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 15 ways as a sum of consecutive naturals, for example, 12169656 + ... + 13206935.

Almost surely, 2^{13161315156240} is an apocalyptic number.

13161315156240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13161315156240 is an abundant number, since it is smaller than the sum of its proper divisors (27657643620336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13161315156240 is a wasteful number, since it uses less digits than its factorization.

13161315156240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25378768 (or 25378762 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 13161315156240 in words is "thirteen trillion, one hundred sixty-one billion, three hundred fifteen million, one hundred fifty-six thousand, two hundred forty".