90909357481650 has 192 divisors, whose sum is σ = 240136936502400. Its totient is φ = 22694411520000.

The previous prime is 90909357481619. The next prime is 90909357481819. The reversal of 90909357481650 is 5618475390909.

It is a super-2 number, since 2×90909357481650² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 411056100 + ... + 411277200.

It is an arithmetic number, because the mean of its divisors is an integer number (1250713210950).

Almost surely, 2^{90909357481650} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90909357481650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120068468251200).

90909357481650 is an abundant number, since it is smaller than the sum of its proper divisors (149227579020750).

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

90909357481650 is a wasteful number, since it uses less digits than its factorization.

90909357481650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222845 (or 222840 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 66.

The spelling of 90909357481650 in words is "ninety trillion, nine hundred nine billion, three hundred fifty-seven million, four hundred eighty-one thousand, six hundred fifty".