5661271256 has 16 divisors (see below), whose sum is σ = 10618857000. Its totient is φ = 2829576064.

The previous prime is 5661271249. The next prime is 5661271271. The reversal of 5661271256 is 6521721665.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109505 + ... + 152688.

Almost surely, 2^5661271256 is an apocalyptic number.

It is an amenable number.

5661271256 is a deficient number, since it is larger than the sum of its proper divisors (4957585744).

5661271256 is a wasteful number, since it uses less digits than its factorization.

5661271256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264898 (or 264894 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 5661271256 is about 75241.4198164814. The cubic root of 5661271256 is about 1782.2610722520.

The spelling of 5661271256 in words is "five billion, six hundred sixty-one million, two hundred seventy-one thousand, two hundred fifty-six".