15561264356140 has 24 divisors (see below), whose sum is σ = 32690077377552. Its totient is φ = 6222330079680.

The previous prime is 15561264356123. The next prime is 15561264356153. The reversal of 15561264356140 is 4165346216551.

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, 135920274 + ... + 136034713.

It is an arithmetic number, because the mean of its divisors is an integer number (1362086557398).

Almost surely, 2^{15561264356140} is an apocalyptic number.

15561264356140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15561264356140 is an abundant number, since it is smaller than the sum of its proper divisors (17128813021412).

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

15561264356140 is a wasteful number, since it uses less digits than its factorization.

15561264356140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271957857 (or 271957855 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 15561264356140 in words is "fifteen trillion, five hundred sixty-one billion, two hundred sixty-four million, three hundred fifty-six thousand, one hundred forty".