551545545091 has 2 divisors, whose sum is σ = 551545545092. Its totient is φ = 551545545090.

The previous prime is 551545545077. The next prime is 551545545097. The reversal of 551545545091 is 190545545155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551545545091 - 2²⁹ = 551008674179 is a prime.

It is not a weakly prime, because it can be changed into another prime (551545545097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275772772545 + 275772772546.

It is an arithmetic number, because the mean of its divisors is an integer number (275772772546).

Almost surely, 2^551545545091 is an apocalyptic number.

551545545091 is a deficient number, since it is larger than the sum of its proper divisors (1).

551545545091 is an equidigital number, since it uses as much as digits as its factorization.

551545545091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250000, while the sum is 49.

The spelling of 551545545091 in words is "five hundred fifty-one billion, five hundred forty-five million, five hundred forty-five thousand, ninety-one".