551116065991 has 2 divisors, whose sum is σ = 551116065992. Its totient is φ = 551116065990.

The previous prime is 551116065979. The next prime is 551116066031. The reversal of 551116065991 is 199560611155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551116065991 - 2¹³ = 551116057799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551116065961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275558032995 + 275558032996.

It is an arithmetic number, because the mean of its divisors is an integer number (275558032996).

Almost surely, 2^551116065991 is an apocalyptic number.

551116065991 is a deficient number, since it is larger than the sum of its proper divisors (1).

551116065991 is an equidigital number, since it uses as much as digits as its factorization.

551116065991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 364500, while the sum is 49.

The spelling of 551116065991 in words is "five hundred fifty-one billion, one hundred sixteen million, sixty-five thousand, nine hundred ninety-one".