90169289080 has 64 divisors (see below), whose sum is σ = 218699933760. Its totient is φ = 33260848128.

The previous prime is 90169289071. The next prime is 90169289117. The reversal of 90169289080 is 8098296109.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453229 + ... + 621091.

It is an arithmetic number, because the mean of its divisors is an integer number (3417186465).

Almost surely, 2^90169289080 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 90169289080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109349966880).

90169289080 is an abundant number, since it is smaller than the sum of its proper divisors (128530644680).

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

90169289080 is a wasteful number, since it uses less digits than its factorization.

90169289080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168920 (or 168916 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 90169289080 in words is "ninety billion, one hundred sixty-nine million, two hundred eighty-nine thousand, eighty".