90401855093 has 4 divisors (see below), whose sum is σ = 98620205568. Its totient is φ = 82183504620.

The previous prime is 90401855083. The next prime is 90401855101. The reversal of 90401855093 is 39055810409.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90401855093 - 2²² = 90397660789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90401855083) 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, 4109175221 + ... + 4109175242.

It is an arithmetic number, because the mean of its divisors is an integer number (24655051392).

Almost surely, 2^90401855093 is an apocalyptic number.

It is an amenable number.

90401855093 is a deficient number, since it is larger than the sum of its proper divisors (8218350475).

90401855093 is a wasteful number, since it uses less digits than its factorization.

90401855093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8218350474.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 90401855093 in words is "ninety billion, four hundred one million, eight hundred fifty-five thousand, ninety-three".