90531549409894 has 16 divisors (see below), whose sum is σ = 135901657498320. Its totient is φ = 45231009646240.

The previous prime is 90531549409877. The next prime is 90531549409907. The reversal of 90531549409894 is 49890494513509.

It is a happy number.

It is a super-2 number, since 2×90531549409894² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11047872 + ... + 17410300.

It is an arithmetic number, because the mean of its divisors is an integer number (8493853593645).

Almost surely, 2^{90531549409894} is an apocalyptic number.

90531549409894 is a deficient number, since it is larger than the sum of its proper divisors (45370108088426).

90531549409894 is a wasteful number, since it uses less digits than its factorization.

90531549409894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6367895.

The product of its (nonzero) digits is 251942400, while the sum is 70.

The spelling of 90531549409894 in words is "ninety trillion, five hundred thirty-one billion, five hundred forty-nine million, four hundred nine thousand, eight hundred ninety-four".