90471771432 has 96 divisors (see below), whose sum is σ = 280529945280. Its totient is φ = 25803083520.

The previous prime is 90471771349. The next prime is 90471771433. The reversal of 90471771432 is 23417717409.

90471771432 is a `hidden beast` number, since 9 + 0 + 47 + 177 + 1 + 432 = 666.

It is not an unprimeable number, because it can be changed into a prime (90471771433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124332 + ... + 443172.

It is an arithmetic number, because the mean of its divisors is an integer number (2922186930).

Almost surely, 2^90471771432 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 90471771432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140264972640).

90471771432 is an abundant number, since it is smaller than the sum of its proper divisors (190058173848).

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

90471771432 is a wasteful number, since it uses less digits than its factorization.

90471771432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319423 (or 319416 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 90471771432 in words is "ninety billion, four hundred seventy-one million, seven hundred seventy-one thousand, four hundred thirty-two".