90646002761 has 2 divisors, whose sum is σ = 90646002762. Its totient is φ = 90646002760.

The previous prime is 90646002709. The next prime is 90646002763. The reversal of 90646002761 is 16720064609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79859934025 + 10786068736 = 282595^2 + 103856^2 .

It is an emirp because it is prime and its reverse (16720064609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90646002761 - 2⁶ = 90646002697 is a prime.

Together with 90646002763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90646002763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45323001380 + 45323001381.

It is an arithmetic number, because the mean of its divisors is an integer number (45323001381).

Almost surely, 2^90646002761 is an apocalyptic number.

It is an amenable number.

90646002761 is a deficient number, since it is larger than the sum of its proper divisors (1).

90646002761 is an equidigital number, since it uses as much as digits as its factorization.

90646002761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 90646002761 in words is "ninety billion, six hundred forty-six million, two thousand, seven hundred sixty-one".