1256833026401 has 8 divisors (see below), whose sum is σ = 1291281976320. Its totient is φ = 1222409365488.

The previous prime is 1256833026391. The next prime is 1256833026409. The reversal of 1256833026401 is 1046203386521.

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 1256833026401 - 2¹⁰ = 1256833025377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256833026409) 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, 6221471 + ... + 6420308.

It is an arithmetic number, because the mean of its divisors is an integer number (161410247040).

Almost surely, 2^{1256833026401} is an apocalyptic number.

It is an amenable number.

1256833026401 is a deficient number, since it is larger than the sum of its proper divisors (34448949919).

1256833026401 is a wasteful number, since it uses less digits than its factorization.

1256833026401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12644503.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 1256833026401 in words is "one trillion, two hundred fifty-six billion, eight hundred thirty-three million, twenty-six thousand, four hundred one".