90665425450 has 24 divisors (see below), whose sum is σ = 171402249420. Its totient is φ = 35671641600.

The previous prime is 90665425429. The next prime is 90665425469. The reversal of 90665425450 is 5452456609.

It is a Cunningham number, because it is equal to 301107²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 2948164209 + 87717261241 = 54297^2 + 296171^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90665425450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14860135 + ... + 14866234.

Almost surely, 2^90665425450 is an apocalyptic number.

90665425450 is a deficient number, since it is larger than the sum of its proper divisors (80736823970).

90665425450 is a wasteful number, since it uses less digits than its factorization.

90665425450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29726442 (or 29726437 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 90665425450 in words is "ninety billion, six hundred sixty-five million, four hundred twenty-five thousand, four hundred fifty".