56587188509 has 2 divisors, whose sum is σ = 56587188510. Its totient is φ = 56587188508.

The previous prime is 56587188419. The next prime is 56587188557. The reversal of 56587188509 is 90588178565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33387329284 + 23199859225 = 182722^2 + 152315^2 .

It is a cyclic number.

It is not a de Polignac number, because 56587188509 - 2⁸ = 56587188253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56587188589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28293594254 + 28293594255.

It is an arithmetic number, because the mean of its divisors is an integer number (28293594255).

Almost surely, 2^56587188509 is an apocalyptic number.

It is an amenable number.

56587188509 is a deficient number, since it is larger than the sum of its proper divisors (1).

56587188509 is an equidigital number, since it uses as much as digits as its factorization.

56587188509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192000, while the sum is 62.

The spelling of 56587188509 in words is "fifty-six billion, five hundred eighty-seven million, one hundred eighty-eight thousand, five hundred nine".