1561682235120 has 80 divisors (see below), whose sum is σ = 5532817067520. Its totient is φ = 356955939072.

The previous prime is 1561682235119. The next prime is 1561682235173. The reversal of 1561682235120 is 215322861651.

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

It is a super-2 number, since 2×1561682235120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 in 15 ways as a sum of consecutive naturals, for example, 464784700 + ... + 464788059.

It is an arithmetic number, because the mean of its divisors is an integer number (69160213344).

Almost surely, 2^{1561682235120} is an apocalyptic number.

1561682235120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1561682235120 is an abundant number, since it is smaller than the sum of its proper divisors (3971134832400).

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

1561682235120 is a wasteful number, since it uses less digits than its factorization.

1561682235120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929572782 (or 929572776 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 1561682235120 in words is "one trillion, five hundred sixty-one billion, six hundred eighty-two million, two hundred thirty-five thousand, one hundred twenty".