90206791472 has 90 divisors (see below), whose sum is σ = 204103491228. Its totient is φ = 38509785216.

The previous prime is 90206791447. The next prime is 90206791483. The reversal of 90206791472 is 27419760209.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 109076723 + ... + 109077549.

Almost surely, 2^90206791472 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 90206791472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102051745614).

90206791472 is an abundant number, since it is smaller than the sum of its proper divisors (113896699756).

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

90206791472 is an equidigital number, since it uses as much as digits as its factorization.

90206791472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1209 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 90206791472 in words is "ninety billion, two hundred six million, seven hundred ninety-one thousand, four hundred seventy-two".