857247333613 has 4 divisors (see below), whose sum is σ = 935178909408. Its totient is φ = 779315757820.

The previous prime is 857247333599. The next prime is 857247333703. The reversal of 857247333613 is 316333742758.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 857247333613 - 2⁵ = 857247333581 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 (857247333013) 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, 38965787881 + ... + 38965787902.

It is an arithmetic number, because the mean of its divisors is an integer number (233794727352).

Almost surely, 2^857247333613 is an apocalyptic number.

It is an amenable number.

857247333613 is a deficient number, since it is larger than the sum of its proper divisors (77931575795).

857247333613 is a wasteful number, since it uses less digits than its factorization.

857247333613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77931575794.

The product of its digits is 7620480, while the sum is 52.

The spelling of 857247333613 in words is "eight hundred fifty-seven billion, two hundred forty-seven million, three hundred thirty-three thousand, six hundred thirteen".