90682697761 has 2 divisors, whose sum is σ = 90682697762. Its totient is φ = 90682697760.

The previous prime is 90682697759. The next prime is 90682697789. The reversal of 90682697761 is 16779628609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89262915361 + 1419782400 = 298769^2 + 37680^2 .

It is a cyclic number.

It is not a de Polignac number, because 90682697761 - 2¹ = 90682697759 is a prime.

Together with 90682697759, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90682697761.

It is not a weakly prime, because it can be changed into another prime (90682697711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45341348880 + 45341348881.

It is an arithmetic number, because the mean of its divisors is an integer number (45341348881).

Almost surely, 2^90682697761 is an apocalyptic number.

It is an amenable number.

90682697761 is a deficient number, since it is larger than the sum of its proper divisors (1).

90682697761 is an equidigital number, since it uses as much as digits as its factorization.

90682697761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 90682697761 in words is "ninety billion, six hundred eighty-two million, six hundred ninety-seven thousand, seven hundred sixty-one".