90923481601 has 4 divisors (see below), whose sum is σ = 94058774100. Its totient is φ = 87788189104.

The previous prime is 90923481599. The next prime is 90923481631. The reversal of 90923481601 is 10618432909.

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 14161238001 + 76762243600 = 119001^2 + 277060^2 .

It is a cyclic number.

It is not a de Polignac number, because 90923481601 - 2¹ = 90923481599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90923481631) 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, 1567646206 + ... + 1567646263.

It is an arithmetic number, because the mean of its divisors is an integer number (23514693525).

Almost surely, 2^90923481601 is an apocalyptic number.

It is an amenable number.

90923481601 is a deficient number, since it is larger than the sum of its proper divisors (3135292499).

90923481601 is a wasteful number, since it uses less digits than its factorization.

90923481601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135292498.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 90923481601 in words is "ninety billion, nine hundred twenty-three million, four hundred eighty-one thousand, six hundred one".