857797289407 has 4 divisors (see below), whose sum is σ = 857800098040. Its totient is φ = 857794480776.

The previous prime is 857797289287. The next prime is 857797289417. The reversal of 857797289407 is 704982797758.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 857797289407 - 2²⁷ = 857663071679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857797289407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857797289417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881253 + ... + 1578670.

It is an arithmetic number, because the mean of its divisors is an integer number (214450024510).

Almost surely, 2^857797289407 is an apocalyptic number.

857797289407 is the 534727-th hex number.

857797289407 is a deficient number, since it is larger than the sum of its proper divisors (2808633).

857797289407 is a wasteful number, since it uses less digits than its factorization.

857797289407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808632.

The product of its (nonzero) digits is 497871360, while the sum is 73.

The spelling of 857797289407 in words is "eight hundred fifty-seven billion, seven hundred ninety-seven million, two hundred eighty-nine thousand, four hundred seven".