1256855070738 has 8 divisors (see below), whose sum is σ = 2513710141488. Its totient is φ = 418951690244.

The previous prime is 1256855070721. The next prime is 1256855070767. The reversal of 1256855070738 is 8370705586521.

It is a sphenic number, since it is the product of 3 distinct primes.

1256855070738 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104737922556 + ... + 104737922567.

It is an arithmetic number, because the mean of its divisors is an integer number (314213767686).

Almost surely, 2^{1256855070738} is an apocalyptic number.

1256855070738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1256855070738 is a wasteful number, since it uses less digits than its factorization.

1256855070738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209475845128.

The product of its (nonzero) digits is 14112000, while the sum is 57.

The spelling of 1256855070738 in words is "one trillion, two hundred fifty-six billion, eight hundred fifty-five million, seventy thousand, seven hundred thirty-eight".