56761984189 has 4 divisors (see below), whose sum is σ = 56764957756. Its totient is φ = 56759010624.

The previous prime is 56761984127. The next prime is 56761984217. The reversal of 56761984189 is 98148916765.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98148916765 = 5 ⋅19629783353.

It can be written as a sum of positive squares in 2 ways, for example, as 54881027289 + 1880956900 = 234267^2 + 43370^2 .

It is a cyclic number.

It is not a de Polignac number, because 56761984189 - 2⁷ = 56761984061 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 56761984189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56761934189) 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, 1457964 + ... + 1496389.

It is an arithmetic number, because the mean of its divisors is an integer number (14191239439).

Almost surely, 2^56761984189 is an apocalyptic number.

It is an amenable number.

56761984189 is a deficient number, since it is larger than the sum of its proper divisors (2973567).

56761984189 is a wasteful number, since it uses less digits than its factorization.

56761984189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973566.

The product of its digits is 26127360, while the sum is 64.

The spelling of 56761984189 in words is "fifty-six billion, seven hundred sixty-one million, nine hundred eighty-four thousand, one hundred eighty-nine".