256299296029 has 4 divisors (see below), whose sum is σ = 292913481184. Its totient is φ = 219685110876.

The previous prime is 256299295999. The next prime is 256299296041. The reversal of 256299296029 is 920692992652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 256299296029 - 2¹⁵ = 256299263261 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 (256299296089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18307092567 + ... + 18307092580.

It is an arithmetic number, because the mean of its divisors is an integer number (73228370296).

Almost surely, 2^256299296029 is an apocalyptic number.

It is an amenable number.

256299296029 is a deficient number, since it is larger than the sum of its proper divisors (36614185155).

256299296029 is an equidigital number, since it uses as much as digits as its factorization.

256299296029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36614185154.

The product of its (nonzero) digits is 18895680, while the sum is 61.

The spelling of 256299296029 in words is "two hundred fifty-six billion, two hundred ninety-nine million, two hundred ninety-six thousand, twenty-nine".