2459856691 has 4 divisors (see below), whose sum is σ = 2493553432. Its totient is φ = 2426159952.

The previous prime is 2459856661. The next prime is 2459856703. The reversal of 2459856691 is 1966589542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1966589542 = 2 ⋅983294771.

It is a cyclic number.

It is not a de Polignac number, because 2459856691 - 2⁷ = 2459856563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2459856631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16848261 + ... + 16848406.

It is an arithmetic number, because the mean of its divisors is an integer number (623388358).

Almost surely, 2^2459856691 is an apocalyptic number.

2459856691 is a deficient number, since it is larger than the sum of its proper divisors (33696741).

2459856691 is an equidigital number, since it uses as much as digits as its factorization.

2459856691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33696740.

The product of its digits is 4665600, while the sum is 55.

The square root of 2459856691 is about 49596.9423553509. The cubic root of 2459856691 is about 1349.9051951714.

The spelling of 2459856691 in words is "two billion, four hundred fifty-nine million, eight hundred fifty-six thousand, six hundred ninety-one".