90531518004787 has 2 divisors, whose sum is σ = 90531518004788. Its totient is φ = 90531518004786.

The previous prime is 90531518004727. The next prime is 90531518004793. The reversal of 90531518004787 is 78740081513509.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90531518004787 is a prime.

It is not a weakly prime, because it can be changed into another prime (90531518004727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45265759002393 + 45265759002394.

It is an arithmetic number, because the mean of its divisors is an integer number (45265759002394).

Almost surely, 2^{90531518004787} is an apocalyptic number.

90531518004787 is a deficient number, since it is larger than the sum of its proper divisors (1).

90531518004787 is an equidigital number, since it uses as much as digits as its factorization.

90531518004787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 90531518004787 in words is "ninety trillion, five hundred thirty-one billion, five hundred eighteen million, four thousand, seven hundred eighty-seven".