2568491951 has 4 divisors (see below), whose sum is σ = 2574593304. Its totient is φ = 2562390600.

The previous prime is 2568491917. The next prime is 2568491957. The reversal of 2568491951 is 1591948652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2568491951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2568491951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568491957) 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, 3050045 + ... + 3050886.

It is an arithmetic number, because the mean of its divisors is an integer number (643648326).

Almost surely, 2^2568491951 is an apocalyptic number.

2568491951 is a deficient number, since it is larger than the sum of its proper divisors (6101353).

2568491951 is an equidigital number, since it uses as much as digits as its factorization.

2568491951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6101352.

The product of its digits is 777600, while the sum is 50.

The square root of 2568491951 is about 50680.2915441496. The cubic root of 2568491951 is about 1369.4916953871.

The spelling of 2568491951 in words is "two billion, five hundred sixty-eight million, four hundred ninety-one thousand, nine hundred fifty-one".