561787949787165 has 48 divisors (see below), whose sum is σ = 977795699212800. Its totient is φ = 298382703163776.

The previous prime is 561787949787151. The next prime is 561787949787173.

561787949787165 is a `hidden beast` number, since 56 + 1 + 7 + 8 + 7 + 9 + 497 + 8 + 7 + 1 + 65 = 666.

561787949787165 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 561787949787165 - 2⁴ = 561787949787149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14342445 + ... + 36459314.

It is an arithmetic number, because the mean of its divisors is an integer number (20370743733600).

Almost surely, 2^{561787949787165} is an apocalyptic number.

It is an amenable number.

561787949787165 is a deficient number, since it is larger than the sum of its proper divisors (416007749425635).

561787949787165 is a wasteful number, since it uses less digits than its factorization.

561787949787165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50802786 (or 50802783 counting only the distinct ones).

The product of its digits is 44808422400, while the sum is 90.

The spelling of 561787949787165 in words is "five hundred sixty-one trillion, seven hundred eighty-seven billion, nine hundred forty-nine million, seven hundred eighty-seven thousand, one hundred sixty-five".