2011858465 has 8 divisors (see below), whose sum is σ = 2447302248. Its totient is φ = 1587438720.

The previous prime is 2011858427. The next prime is 2011858487. The reversal of 2011858465 is 5648581102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 562685841 + 1449172624 = 23721^2 + 38068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2011858465 - 2⁷ = 2011858337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2755606 + ... + 2756335.

It is an arithmetic number, because the mean of its divisors is an integer number (305912781).

Almost surely, 2^2011858465 is an apocalyptic number.

It is an amenable number.

2011858465 is a deficient number, since it is larger than the sum of its proper divisors (435443783).

2011858465 is an equidigital number, since it uses as much as digits as its factorization.

2011858465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5512019.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 2011858465 is about 44853.7452728309. The cubic root of 2011858465 is about 1262.4062661514.

The spelling of 2011858465 in words is "two billion, eleven million, eight hundred fifty-eight thousand, four hundred sixty-five".