5256561843 has 48 divisors (see below), whose sum is σ = 8480122560. Its totient is φ = 3116558592.

The previous prime is 5256561839. The next prime is 5256561847. The reversal of 5256561843 is 3481656525.

5256561843 is a `hidden beast` number, since 5 + 2 + 5 + 6 + 561 + 84 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (5256561839) and next prime (5256561847).

It is not a de Polignac number, because 5256561843 - 2² = 5256561839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5256561847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 439993 + ... + 451781.

It is an arithmetic number, because the mean of its divisors is an integer number (176669220).

Almost surely, 2^5256561843 is an apocalyptic number.

5256561843 is a deficient number, since it is larger than the sum of its proper divisors (3223560717).

5256561843 is a wasteful number, since it uses less digits than its factorization.

5256561843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11948 (or 11945 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 5256561843 is about 72502.1506094819. The cubic root of 5256561843 is about 1738.7371206922.

The spelling of 5256561843 in words is "five billion, two hundred fifty-six million, five hundred sixty-one thousand, eight hundred forty-three".