561111677903 has 4 divisors (see below), whose sum is σ = 641270489040. Its totient is φ = 480952866768.

The previous prime is 561111677873. The next prime is 561111677969. The reversal of 561111677903 is 309776111165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561111677903 - 2⁸ = 561111677647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561111677993) 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, 40079405558 + ... + 40079405571.

It is an arithmetic number, because the mean of its divisors is an integer number (160317622260).

Almost surely, 2^561111677903 is an apocalyptic number.

561111677903 is a deficient number, since it is larger than the sum of its proper divisors (80158811137).

561111677903 is an equidigital number, since it uses as much as digits as its factorization.

561111677903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80158811136.

The product of its (nonzero) digits is 238140, while the sum is 47.

The spelling of 561111677903 in words is "five hundred sixty-one billion, one hundred eleven million, six hundred seventy-seven thousand, nine hundred three".