8256021311249 has 8 divisors (see below), whose sum is σ = 8260233131520. Its totient is φ = 8251810180416.

The previous prime is 8256021311243. The next prime is 8256021311281. The reversal of 8256021311249 is 9421131206528.

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 8256021311249 - 2²⁸ = 8255752875793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8256021311243) 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, 24693017 + ... + 25025129.

It is an arithmetic number, because the mean of its divisors is an integer number (1032529141440).

Almost surely, 2^{8256021311249} is an apocalyptic number.

It is an amenable number.

8256021311249 is a deficient number, since it is larger than the sum of its proper divisors (4211820271).

8256021311249 is a wasteful number, since it uses less digits than its factorization.

8256021311249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344719.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 8256021311249 in words is "eight trillion, two hundred fifty-six billion, twenty-one million, three hundred eleven thousand, two hundred forty-nine".