55513016791 has 2 divisors, whose sum is σ = 55513016792. Its totient is φ = 55513016790.

The previous prime is 55513016789. The next prime is 55513016807. The reversal of 55513016791 is 19761031555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55513016791 - 2¹ = 55513016789 is a prime.

Together with 55513016789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55513016701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27756508395 + 27756508396.

It is an arithmetic number, because the mean of its divisors is an integer number (27756508396).

Almost surely, 2^55513016791 is an apocalyptic number.

55513016791 is a deficient number, since it is larger than the sum of its proper divisors (1).

55513016791 is an equidigital number, since it uses as much as digits as its factorization.

55513016791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141750, while the sum is 43.

The spelling of 55513016791 in words is "fifty-five billion, five hundred thirteen million, sixteen thousand, seven hundred ninety-one".