1561195307040 has 48 divisors (see below), whose sum is σ = 4917765218688. Its totient is φ = 416318748416.

The previous prime is 1561195307039. The next prime is 1561195307081. The reversal of 1561195307040 is 407035911651.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1561195306983 and 1561195307001.

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, 1626244632 + ... + 1626245591.

It is an arithmetic number, because the mean of its divisors is an integer number (102453442056).

Almost surely, 2^{1561195307040} is an apocalyptic number.

1561195307040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1561195307040 is an abundant number, since it is smaller than the sum of its proper divisors (3356569911648).

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

1561195307040 is a wasteful number, since it uses less digits than its factorization.

1561195307040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252490241 (or 3252490233 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 42.

The spelling of 1561195307040 in words is "one trillion, five hundred sixty-one billion, one hundred ninety-five million, three hundred seven thousand, forty".