56702784661 has 2 divisors, whose sum is σ = 56702784662. Its totient is φ = 56702784660.

The previous prime is 56702784631. The next prime is 56702784679. The reversal of 56702784661 is 16648720765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56498437636 + 204347025 = 237694^2 + 14295^2 .

It is a cyclic number.

It is not a de Polignac number, because 56702784661 - 2¹³ = 56702776469 is a prime.

It is a super-3 number, since 3×56702784661³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56702784599 and 56702784608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56702784631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28351392330 + 28351392331.

It is an arithmetic number, because the mean of its divisors is an integer number (28351392331).

Almost surely, 2^56702784661 is an apocalyptic number.

It is an amenable number.

56702784661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56702784661 is an equidigital number, since it uses as much as digits as its factorization.

56702784661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 56702784661 in words is "fifty-six billion, seven hundred two million, seven hundred eighty-four thousand, six hundred sixty-one".