90231569556481 has 8 divisors (see below), whose sum is σ = 94156928820864. Its totient is φ = 86306397587520.

The previous prime is 90231569556379. The next prime is 90231569556613. The reversal of 90231569556481 is 18465596513209.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90231569556481 - 2¹⁷ = 90231569425409 is a prime.

It is a super-2 number, since 2×90231569556481² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90231569556181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45838936 + ... + 47766841.

It is an arithmetic number, because the mean of its divisors is an integer number (11769616102608).

Almost surely, 2^{90231569556481} is an apocalyptic number.

It is an amenable number.

90231569556481 is a deficient number, since it is larger than the sum of its proper divisors (3925359264383).

90231569556481 is a wasteful number, since it uses less digits than its factorization.

90231569556481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93647711.

The product of its (nonzero) digits is 69984000, while the sum is 64.

The spelling of 90231569556481 in words is "ninety trillion, two hundred thirty-one billion, five hundred sixty-nine million, five hundred fifty-six thousand, four hundred eighty-one".