1256833026402 has 16 divisors (see below), whose sum is σ = 2513686711680. Its totient is φ = 418940898992.

The previous prime is 1256833026391. The next prime is 1256833026409. The reversal of 1256833026402 is 2046203386521.

It is a happy 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, 4353 + ... + 1585460.

It is an arithmetic number, because the mean of its divisors is an integer number (157105419480).

Almost surely, 2^{1256833026402} is an apocalyptic number.

1256833026402 is an abundant number, since it is smaller than the sum of its proper divisors (1256853685278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256833026402 is a wasteful number, since it uses less digits than its factorization.

1256833026402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721577.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 1256833026402 in words is "one trillion, two hundred fifty-six billion, eight hundred thirty-three million, twenty-six thousand, four hundred two".