90320855142 has 96 divisors (see below), whose sum is σ = 223860067200. Its totient is φ = 24153075072.

The previous prime is 90320855117. The next prime is 90320855153. The reversal of 90320855142 is 24155802309.

It is a self number, because there is not a number n which added to its sum of digits gives 90320855142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 366234 + ... + 561042.

It is an arithmetic number, because the mean of its divisors is an integer number (2331875700).

Almost surely, 2^90320855142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90320855142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111930033600).

90320855142 is an abundant number, since it is smaller than the sum of its proper divisors (133539212058).

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

90320855142 is a wasteful number, since it uses less digits than its factorization.

90320855142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194930 (or 194923 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 90320855142 in words is "ninety billion, three hundred twenty million, eight hundred fifty-five thousand, one hundred forty-two".