256251001115 has 8 divisors (see below), whose sum is σ = 307717303488. Its totient is φ = 204856732800.

The previous prime is 256251001109. The next prime is 256251001129. The reversal of 256251001115 is 511100152652.

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

It is not a de Polignac number, because 256251001115 - 2⁶ = 256251001051 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18000686 + ... + 18014915.

It is an arithmetic number, because the mean of its divisors is an integer number (38464662936).

Almost surely, 2^256251001115 is an apocalyptic number.

256251001115 is a deficient number, since it is larger than the sum of its proper divisors (51466302373).

256251001115 is a wasteful number, since it uses less digits than its factorization.

256251001115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36017029.

The product of its (nonzero) digits is 3000, while the sum is 29.

Adding to 256251001115 its reverse (511100152652), we get a palindrome (767351153767).

The spelling of 256251001115 in words is "two hundred fifty-six billion, two hundred fifty-one million, one thousand, one hundred fifteen".