256402510001 has 8 divisors (see below), whose sum is σ = 279879441600. Its totient is φ = 232953513840.

The previous prime is 256402509983. The next prime is 256402510019. The reversal of 256402510001 is 100015204652.

It is an interprime number because it is at equal distance from previous prime (256402509983) and next prime (256402510019).

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 256402510001 - 2¹⁰ = 256402508977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256402510061) 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, 6964661 + ... + 7001378.

It is an arithmetic number, because the mean of its divisors is an integer number (34984930200).

Almost surely, 2^256402510001 is an apocalyptic number.

It is an amenable number.

256402510001 is a deficient number, since it is larger than the sum of its proper divisors (23476931599).

256402510001 is a wasteful number, since it uses less digits than its factorization.

256402510001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13967719.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 256402510001 its reverse (100015204652), we get a palindrome (356417714653).

The spelling of 256402510001 in words is "two hundred fifty-six billion, four hundred two million, five hundred ten thousand, one".