90682063621 has 4 divisors (see below), whose sum is σ = 90683587852. Its totient is φ = 90680539392.

The previous prime is 90682063607. The next prime is 90682063639. The reversal of 90682063621 is 12636028609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12636028609 = 52807 ⋅239287.

It can be written as a sum of positive squares in 2 ways, for example, as 85398372900 + 5283690721 = 292230^2 + 72689^2 .

It is a cyclic number.

It is not a de Polignac number, because 90682063621 - 2²⁷ = 90547845893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90682063721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669090 + ... + 793123.

It is an arithmetic number, because the mean of its divisors is an integer number (22670896963).

Almost surely, 2^90682063621 is an apocalyptic number.

It is an amenable number.

90682063621 is a deficient number, since it is larger than the sum of its proper divisors (1524231).

90682063621 is a wasteful number, since it uses less digits than its factorization.

90682063621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524230.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 90682063621 in words is "ninety billion, six hundred eighty-two million, sixty-three thousand, six hundred twenty-one".