90454890761 has 2 divisors, whose sum is σ = 90454890762. Its totient is φ = 90454890760.

The previous prime is 90454890707. The next prime is 90454890791. The reversal of 90454890761 is 16709845409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47245369600 + 43209521161 = 217360^2 + 207869^2 .

It is an emirp because it is prime and its reverse (16709845409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90454890761 - 2¹⁰ = 90454889737 is a prime.

It is not a weakly prime, because it can be changed into another prime (90454890791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45227445380 + 45227445381.

It is an arithmetic number, because the mean of its divisors is an integer number (45227445381).

Almost surely, 2^90454890761 is an apocalyptic number.

It is an amenable number.

90454890761 is a deficient number, since it is larger than the sum of its proper divisors (1).

90454890761 is an equidigital number, since it uses as much as digits as its factorization.

90454890761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 90454890761 in words is "ninety billion, four hundred fifty-four million, eight hundred ninety thousand, seven hundred sixty-one".