256266645001 has 8 divisors (see below), whose sum is σ = 265382226504. Its totient is φ = 247309595520.

The previous prime is 256266644947. The next prime is 256266645007. The reversal of 256266645001 is 100546662652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6717441600 + 249549203401 = 81960^2 + 499549^2 .

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 256266645001 - 2¹³ = 256266636809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256266645007) 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, 39629716 + ... + 39636181.

It is an arithmetic number, because the mean of its divisors is an integer number (33172778313).

Almost surely, 2^256266645001 is an apocalyptic number.

It is an amenable number.

256266645001 is a deficient number, since it is larger than the sum of its proper divisors (9115581503).

256266645001 is an equidigital number, since it uses as much as digits as its factorization.

256266645001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79266011.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 256266645001 in words is "two hundred fifty-six billion, two hundred sixty-six million, six hundred forty-five thousand, one".