1256771047433 has 16 divisors (see below), whose sum is σ = 1375852093056. Its totient is φ = 1138495712640.

The previous prime is 1256771047429. The next prime is 1256771047439. The reversal of 1256771047433 is 3347401776521.

It is not a de Polignac number, because 1256771047433 - 2² = 1256771047429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256771047439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43228460 + ... + 43257522.

It is an arithmetic number, because the mean of its divisors is an integer number (85990755816).

Almost surely, 2^{1256771047433} is an apocalyptic number.

It is an amenable number.

1256771047433 is a deficient number, since it is larger than the sum of its proper divisors (119081045623).

1256771047433 is a wasteful number, since it uses less digits than its factorization.

1256771047433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42784.

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 1256771047433 in words is "one trillion, two hundred fifty-six billion, seven hundred seventy-one million, forty-seven thousand, four hundred thirty-three".