1561860756012 has 12 divisors (see below), whose sum is σ = 3644341764056. Its totient is φ = 520620252000.

The previous prime is 1561860755971. The next prime is 1561860756017. The reversal of 1561860756012 is 2106570681651.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1561860756017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65077531489 + ... + 65077531512.

Almost surely, 2^{1561860756012} is an apocalyptic number.

1561860756012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561860756012 is an abundant number, since it is smaller than the sum of its proper divisors (2082481008044).

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

1561860756012 is a wasteful number, since it uses less digits than its factorization.

1561860756012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130155063008 (or 130155063006 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 1561860756012 in words is "one trillion, five hundred sixty-one billion, eight hundred sixty million, seven hundred fifty-six thousand, twelve".