6256639892 has 12 divisors (see below), whose sum is σ = 10955919156. Its totient is φ = 3126377280.

The previous prime is 6256639871. The next prime is 6256639933. The reversal of 6256639892 is 2989366526.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3609125776 + 2647514116 = 60076^2 + 51454^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478409 + ... + 491312.

It is an arithmetic number, because the mean of its divisors is an integer number (912993263).

Almost surely, 2^6256639892 is an apocalyptic number.

It is an amenable number.

6256639892 is a deficient number, since it is larger than the sum of its proper divisors (4699279264).

6256639892 is a wasteful number, since it uses less digits than its factorization.

6256639892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971338 (or 971336 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 56.

The square root of 6256639892 is about 79098.9247208835. The cubic root of 6256639892 is about 1842.6678270233.

The spelling of 6256639892 in words is "six billion, two hundred fifty-six million, six hundred thirty-nine thousand, eight hundred ninety-two".