2643425857 has 4 divisors (see below), whose sum is σ = 2758357440. Its totient is φ = 2528494276.

The previous prime is 2643425843. The next prime is 2643425899. The reversal of 2643425857 is 7585243462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2643425857 - 2¹⁵ = 2643393089 is a prime.

It is a super-2 number, since 2×2643425857² = 13975400522912368898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2643425957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57465757 + ... + 57465802.

It is an arithmetic number, because the mean of its divisors is an integer number (689589360).

Almost surely, 2^2643425857 is an apocalyptic number.

It is an amenable number.

2643425857 is a deficient number, since it is larger than the sum of its proper divisors (114931583).

2643425857 is a wasteful number, since it uses less digits than its factorization.

2643425857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114931582.

The product of its digits is 1612800, while the sum is 46.

The square root of 2643425857 is about 51414.2573319891. The cubic root of 2643425857 is about 1382.6822189504.

The spelling of 2643425857 in words is "two billion, six hundred forty-three million, four hundred twenty-five thousand, eight hundred fifty-seven".