561665011051 has 8 divisors (see below), whose sum is σ = 575374186800. Its totient is φ = 547956312960.

The previous prime is 561665010997. The next prime is 561665011073. The reversal of 561665011051 is 150110566165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561665011051 - 2⁷ = 561665010923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561665011051.

It is not an unprimeable number, because it can be changed into a prime (561665017051) 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 7 ways as a sum of consecutive naturals, for example, 3857095 + ... + 4000063.

It is an arithmetic number, because the mean of its divisors is an integer number (71921773350).

Almost surely, 2^561665011051 is an apocalyptic number.

561665011051 is a deficient number, since it is larger than the sum of its proper divisors (13709175749).

561665011051 is a wasteful number, since it uses less digits than its factorization.

561665011051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238829.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 561665011051 in words is "five hundred sixty-one billion, six hundred sixty-five million, eleven thousand, fifty-one".