56554989919 has 2 divisors, whose sum is σ = 56554989920. Its totient is φ = 56554989918.

The previous prime is 56554989833. The next prime is 56554989929. The reversal of 56554989919 is 91998945565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56554989919 - 2²³ = 56546601311 is a prime.

It is a super-2 number, since 2×56554989919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56554989929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28277494959 + 28277494960.

It is an arithmetic number, because the mean of its divisors is an integer number (28277494960).

Almost surely, 2^56554989919 is an apocalyptic number.

56554989919 is a deficient number, since it is larger than the sum of its proper divisors (1).

56554989919 is an equidigital number, since it uses as much as digits as its factorization.

56554989919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464000, while the sum is 70.

The spelling of 56554989919 in words is "fifty-six billion, five hundred fifty-four million, nine hundred eighty-nine thousand, nine hundred nineteen".