857197049015 has 8 divisors (see below), whose sum is σ = 1034021991168. Its totient is φ = 682167284320.

The previous prime is 857197049011. The next prime is 857197049077. The reversal of 857197049015 is 510940791758.

It is a happy number.

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

It is not a de Polignac number, because 857197049015 - 2² = 857197049011 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 (857197049011) 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, 448793312 + ... + 448795221.

It is an arithmetic number, because the mean of its divisors is an integer number (129252748896).

Almost surely, 2^857197049015 is an apocalyptic number.

857197049015 is a deficient number, since it is larger than the sum of its proper divisors (176824942153).

857197049015 is a wasteful number, since it uses less digits than its factorization.

857197049015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897588729.

The product of its (nonzero) digits is 3175200, while the sum is 56.

The spelling of 857197049015 in words is "eight hundred fifty-seven billion, one hundred ninety-seven million, forty-nine thousand, fifteen".