3561131897880 has 96 divisors (see below), whose sum is σ = 10691381611440. Its totient is φ = 948925838080.

The previous prime is 3561131897857. The next prime is 3561131897893. The reversal of 3561131897880 is 887981311653.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265333570 + ... + 265346990.

Almost surely, 2^{3561131897880} is an apocalyptic number.

3561131897880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3561131897880 is an abundant number, since it is smaller than the sum of its proper divisors (7130249713560).

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

3561131897880 is a wasteful number, since it uses less digits than its factorization.

3561131897880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16409 (or 14918 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 3561131897880 in words is "three trillion, five hundred sixty-one billion, one hundred thirty-one million, eight hundred ninety-seven thousand, eight hundred eighty".