1256143045782 has 32 divisors (see below), whose sum is σ = 2665948412160. Its totient is φ = 393721079840.

The previous prime is 1256143045771. The next prime is 1256143045831. The reversal of 1256143045782 is 2875403416521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77131569 + ... + 77147852.

It is an arithmetic number, because the mean of its divisors is an integer number (83310887880).

Almost surely, 2^{1256143045782} is an apocalyptic number.

1256143045782 is an abundant number, since it is smaller than the sum of its proper divisors (1409805366378).

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

1256143045782 is a wasteful number, since it uses less digits than its factorization.

1256143045782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154279508.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 1256143045782 in words is "one trillion, two hundred fifty-six billion, one hundred forty-three million, forty-five thousand, seven hundred eighty-two".