90049777662 has 64 divisors (see below), whose sum is σ = 197338901760. Its totient is φ = 27224446464.

The previous prime is 90049777661. The next prime is 90049777703. The reversal of 90049777662 is 26677794009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90049777661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13034013 + ... + 13040919.

It is an arithmetic number, because the mean of its divisors is an integer number (3083420340).

Almost surely, 2^90049777662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90049777662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98669450880).

90049777662 is an abundant number, since it is smaller than the sum of its proper divisors (107289124098).

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

90049777662 is a wasteful number, since it uses less digits than its factorization.

90049777662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9817.

The product of its (nonzero) digits is 8001504, while the sum is 57.

The spelling of 90049777662 in words is "ninety billion, forty-nine million, seven hundred seventy-seven thousand, six hundred sixty-two".