256706766237 has 8 divisors (see below), whose sum is σ = 353316839680. Its totient is φ = 165617268480.

The previous prime is 256706766167. The next prime is 256706766263. The reversal of 256706766237 is 732667607652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256706766237 - 2⁸ = 256706765981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256706066237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1380143812 + ... + 1380143997.

It is an arithmetic number, because the mean of its divisors is an integer number (44164604960).

Almost surely, 2^256706766237 is an apocalyptic number.

It is an amenable number.

256706766237 is a deficient number, since it is larger than the sum of its proper divisors (96610073443).

256706766237 is a wasteful number, since it uses less digits than its factorization.

256706766237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760287843.

The product of its (nonzero) digits is 26671680, while the sum is 57.

The spelling of 256706766237 in words is "two hundred fifty-six billion, seven hundred six million, seven hundred sixty-six thousand, two hundred thirty-seven".