2191468590 has 48 divisors (see below), whose sum is σ = 5702323536. Its totient is φ = 583929600.

The previous prime is 2191468583. The next prime is 2191468619. The reversal of 2191468590 is 958641912.

2191468590 is a `hidden beast` number, since 2 + 19 + 1 + 46 + 8 + 590 = 666.

It is a super-3 number, since 3×2191468590³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113545 + ... + 131435.

It is an arithmetic number, because the mean of its divisors is an integer number (118798407).

Almost surely, 2^2191468590 is an apocalyptic number.

2191468590 is an abundant number, since it is smaller than the sum of its proper divisors (3510854946).

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

2191468590 is a wasteful number, since it uses less digits than its factorization.

2191468590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19265 (or 19262 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 2191468590 is about 46813.1241213402. The cubic root of 2191468590 is about 1298.9080752136.

The spelling of 2191468590 in words is "two billion, one hundred ninety-one million, four hundred sixty-eight thousand, five hundred ninety".