1560661650561 has 16 divisors (see below), whose sum is σ = 2283232142016. Its totient is φ = 942286278336.

The previous prime is 1560661650553. The next prime is 1560661650577. The reversal of 1560661650561 is 1650561660651.

It is not a de Polignac number, because 1560661650561 - 2³ = 1560661650553 is a prime.

It is a super-2 number, since 2×1560661650561² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1560661650561.

It is not an unprimeable number, because it can be changed into a prime (1560661650161) by changing a digit.

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, 377516475 + ... + 377520608.

It is an arithmetic number, because the mean of its divisors is an integer number (142702008876).

Almost surely, 2^{1560661650561} is an apocalyptic number.

It is an amenable number.

1560661650561 is a deficient number, since it is larger than the sum of its proper divisors (722570491455).

1560661650561 is a wasteful number, since it uses less digits than its factorization.

1560661650561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755037152.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 1560661650561 in words is "one trillion, five hundred sixty billion, six hundred sixty-one million, six hundred fifty thousand, five hundred sixty-one".