55864874693 has 2 divisors, whose sum is σ = 55864874694. Its totient is φ = 55864874692.

The previous prime is 55864874557. The next prime is 55864874701. The reversal of 55864874693 is 39647846855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44140749409 + 11724125284 = 210097^2 + 108278^2 .

It is a cyclic number.

It is not a de Polignac number, because 55864874693 - 2²² = 55860680389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55864874293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27932437346 + 27932437347.

It is an arithmetic number, because the mean of its divisors is an integer number (27932437347).

Almost surely, 2^55864874693 is an apocalyptic number.

It is an amenable number.

55864874693 is a deficient number, since it is larger than the sum of its proper divisors (1).

55864874693 is an equidigital number, since it uses as much as digits as its factorization.

55864874693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174182400, while the sum is 65.

The spelling of 55864874693 in words is "fifty-five billion, eight hundred sixty-four million, eight hundred seventy-four thousand, six hundred ninety-three".