90005405551 has 2 divisors, whose sum is σ = 90005405552. Its totient is φ = 90005405550.

The previous prime is 90005405527. The next prime is 90005405561. The reversal of 90005405551 is 15550450009.

It is a strong prime.

It is an emirp because it is prime and its reverse (15550450009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90005405551 - 2⁵ = 90005405519 is a prime.

It is a super-2 number, since 2×90005405551² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90005405521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45002702775 + 45002702776.

It is an arithmetic number, because the mean of its divisors is an integer number (45002702776).

Almost surely, 2^90005405551 is an apocalyptic number.

90005405551 is a deficient number, since it is larger than the sum of its proper divisors (1).

90005405551 is an equidigital number, since it uses as much as digits as its factorization.

90005405551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 90005405551 in words is "ninety billion, five million, four hundred five thousand, five hundred fifty-one".