90578862922997 has 4 divisors (see below), whose sum is σ = 90585435671916. Its totient is φ = 90572290174080.

The previous prime is 90578862922969. The next prime is 90578862923053. The reversal of 90578862922997 is 79922926887509.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45891763727716 + 44687099195281 = 6774346^2 + 6684841^2 .

It is a cyclic number.

It is not a de Polignac number, because 90578862922997 - 2²⁰ = 90578861874421 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 (90578862924997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3286353788 + ... + 3286381349.

It is an arithmetic number, because the mean of its divisors is an integer number (22646358917979).

Almost surely, 2^{90578862922997} is an apocalyptic number.

It is an amenable number.

90578862922997 is a deficient number, since it is larger than the sum of its proper divisors (6572748919).

90578862922997 is a wasteful number, since it uses less digits than its factorization.

90578862922997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572748918.

The product of its (nonzero) digits is 4938071040, while the sum is 83.

The spelling of 90578862922997 in words is "ninety trillion, five hundred seventy-eight billion, eight hundred sixty-two million, nine hundred twenty-two thousand, nine hundred ninety-seven".