1561032215611 has 12 divisors (see below), whose sum is σ = 1732833909072. Its totient is φ = 1405069490000.

The previous prime is 1561032215609. The next prime is 1561032215627. The reversal of 1561032215611 is 1165122301651.

It is not a de Polignac number, because 1561032215611 - 2¹ = 1561032215609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561032215641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63854575 + ... + 63879016.

It is an arithmetic number, because the mean of its divisors is an integer number (144402825756).

Almost surely, 2^{1561032215611} is an apocalyptic number.

1561032215611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1561032215611 is a deficient number, since it is larger than the sum of its proper divisors (171801693461).

1561032215611 is a wasteful number, since it uses less digits than its factorization.

1561032215611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127733714 (or 127733703 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 1561032215611 in words is "one trillion, five hundred sixty-one billion, thirty-two million, two hundred fifteen thousand, six hundred eleven".