90659733556 has 180 divisors, whose sum is σ = 198410291520. Its totient is φ = 36233477280.

The previous prime is 90659733539. The next prime is 90659733559. The reversal of 90659733556 is 65533795609.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90659733556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90659733559) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 273896311 + ... + 273896641.

Almost surely, 2^90659733556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90659733556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99205145760).

90659733556 is an abundant number, since it is smaller than the sum of its proper divisors (107750557964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90659733556 is a wasteful number, since it uses less digits than its factorization.

90659733556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 22963500, while the sum is 58.

The spelling of 90659733556 in words is "ninety billion, six hundred fifty-nine million, seven hundred thirty-three thousand, five hundred fifty-six".