857129453957 has 8 divisors (see below), whose sum is σ = 980111528832. Its totient is φ = 734281131600.

The previous prime is 857129453909. The next prime is 857129453963. The reversal of 857129453957 is 759354921758.

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 857129453957 - 2¹⁶ = 857129388421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857129453893 and 857129453902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857129453657) 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, 33424394 + ... + 33450027.

It is an arithmetic number, because the mean of its divisors is an integer number (122513941104).

Almost surely, 2^857129453957 is an apocalyptic number.

It is an amenable number.

857129453957 is a deficient number, since it is larger than the sum of its proper divisors (122982074875).

857129453957 is a wasteful number, since it uses less digits than its factorization.

857129453957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66876259.

The product of its digits is 95256000, while the sum is 65.

The spelling of 857129453957 in words is "eight hundred fifty-seven billion, one hundred twenty-nine million, four hundred fifty-three thousand, nine hundred fifty-seven".