55499457191 has 2 divisors, whose sum is σ = 55499457192. Its totient is φ = 55499457190.

The previous prime is 55499457151. The next prime is 55499457257. The reversal of 55499457191 is 19175499455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55499457191 - 2²⁶ = 55432348327 is a prime.

It is a super-2 number, since 2×55499457191² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55499457191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55499457151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27749728595 + 27749728596.

It is an arithmetic number, because the mean of its divisors is an integer number (27749728596).

Almost surely, 2^55499457191 is an apocalyptic number.

55499457191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55499457191 is an equidigital number, since it uses as much as digits as its factorization.

55499457191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206000, while the sum is 59.

The spelling of 55499457191 in words is "fifty-five billion, four hundred ninety-nine million, four hundred fifty-seven thousand, one hundred ninety-one".