90256408712 has 12 divisors (see below), whose sum is σ = 169232359605. Its totient is φ = 45127779488.

The previous prime is 90256408703. The next prime is 90256408769. The reversal of 90256408712 is 21780465209.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 75621700036 + 14634708676 = 274994^2 + 120974^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=212434.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 796628 + ... + 902844.

Almost surely, 2^90256408712 is an apocalyptic number.

It is an amenable number.

90256408712 is a deficient number, since it is larger than the sum of its proper divisors (78975950893).

90256408712 is an frugal number, since it uses more digits than its factorization.

90256408712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212440 (or 106219 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 90256408712 in words is "ninety billion, two hundred fifty-six million, four hundred eight thousand, seven hundred twelve".