256547172462706 has 4 divisors (see below), whose sum is σ = 384820758694062. Its totient is φ = 128273586231352.

The previous prime is 256547172462697. The next prime is 256547172462731. The reversal of 256547172462706 is 607264271745652.

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

It can be written as a sum of positive squares in only one way, i.e., 177176731100625 + 79370441362081 = 13310775^2 + 8909009^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64136793115675 + ... + 64136793115678.

Almost surely, 2^{256547172462706} is an apocalyptic number.

256547172462706 is a deficient number, since it is larger than the sum of its proper divisors (128273586231356).

256547172462706 is a wasteful number, since it uses less digits than its factorization.

256547172462706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128273586231355.

The product of its (nonzero) digits is 237081600, while the sum is 64.

The spelling of 256547172462706 in words is "two hundred fifty-six trillion, five hundred forty-seven billion, one hundred seventy-two million, four hundred sixty-two thousand, seven hundred six".