1256771047432 has 8 divisors (see below), whose sum is σ = 2356445713950. Its totient is φ = 628385523712.

The previous prime is 1256771047429. The next prime is 1256771047439. The reversal of 1256771047432 is 2347401776521.

It can be written as a sum of positive squares in only one way, i.e., 762244240356 + 494526807076 = 873066^2 + 703226^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 78548190457 + ... + 78548190472.

Almost surely, 2^{1256771047432} is an apocalyptic number.

It is an amenable number.

1256771047432 is a deficient number, since it is larger than the sum of its proper divisors (1099674666518).

1256771047432 is a wasteful number, since it uses less digits than its factorization.

1256771047432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157096380935 (or 157096380931 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 1256771047432 in words is "one trillion, two hundred fifty-six billion, seven hundred seventy-one million, forty-seven thousand, four hundred thirty-two".