256632022167247 has 8 divisors (see below), whose sum is σ = 262623881822544. Its totient is φ = 250641238561728.

The previous prime is 256632022167197. The next prime is 256632022167251. The reversal of 256632022167247 is 742761220236652.

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

It is a cyclic number.

It is not a de Polignac number, because 256632022167247 - 2²⁷ = 256631887949519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256632022162247) 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, 268529878 + ... + 269483875.

It is an arithmetic number, because the mean of its divisors is an integer number (32827985227818).

Almost surely, 2^{256632022167247} is an apocalyptic number.

256632022167247 is a deficient number, since it is larger than the sum of its proper divisors (5991859655297).

256632022167247 is a wasteful number, since it uses less digits than its factorization.

256632022167247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538024889.

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 256632022167247 in words is "two hundred fifty-six trillion, six hundred thirty-two billion, twenty-two million, one hundred sixty-seven thousand, two hundred forty-seven".