55572859891 has 2 divisors, whose sum is σ = 55572859892. Its totient is φ = 55572859890.

The previous prime is 55572859889. The next prime is 55572859939. The reversal of 55572859891 is 19895827555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55572859891 - 2¹ = 55572859889 is a prime.

Together with 55572859889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55572859871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27786429945 + 27786429946.

It is an arithmetic number, because the mean of its divisors is an integer number (27786429946).

Almost surely, 2^55572859891 is an apocalyptic number.

55572859891 is a deficient number, since it is larger than the sum of its proper divisors (1).

55572859891 is an equidigital number, since it uses as much as digits as its factorization.

55572859891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360000, while the sum is 64.

The spelling of 55572859891 in words is "fifty-five billion, five hundred seventy-two million, eight hundred fifty-nine thousand, eight hundred ninety-one".