1256632730117 has 8 divisors (see below), whose sum is σ = 1323606936960. Its totient is φ = 1189742087520.

The previous prime is 1256632730057. The next prime is 1256632730131. The reversal of 1256632730117 is 7110372366521.

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

It is a cyclic number.

It is not a de Polignac number, because 1256632730117 - 2¹² = 1256632726021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256632730317) 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, 20860184 + ... + 20920337.

It is an arithmetic number, because the mean of its divisors is an integer number (165450867120).

Almost surely, 2^{1256632730117} is an apocalyptic number.

It is an amenable number.

1256632730117 is a deficient number, since it is larger than the sum of its proper divisors (66974206843).

1256632730117 is a wasteful number, since it uses less digits than its factorization.

1256632730117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41782123.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 1256632730117 in words is "one trillion, two hundred fifty-six billion, six hundred thirty-two million, seven hundred thirty thousand, one hundred seventeen".