55891723799 has 2 divisors, whose sum is σ = 55891723800. Its totient is φ = 55891723798.

The previous prime is 55891723763. The next prime is 55891723817. The reversal of 55891723799 is 99732719855.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55891723799 - 2²⁴ = 55874946583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55891723739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27945861899 + 27945861900.

It is an arithmetic number, because the mean of its divisors is an integer number (27945861900).

Almost surely, 2^55891723799 is an apocalyptic number.

55891723799 is a deficient number, since it is larger than the sum of its proper divisors (1).

55891723799 is an equidigital number, since it uses as much as digits as its factorization.

55891723799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 65.

The spelling of 55891723799 in words is "fifty-five billion, eight hundred ninety-one million, seven hundred twenty-three thousand, seven hundred ninety-nine".