857129453955 has 24 divisors (see below), whose sum is σ = 1488045605280. Its totient is φ = 456411231360.

The previous prime is 857129453909. The next prime is 857129453963. The reversal of 857129453955 is 559354921758.

857129453955 is a `hidden beast` number, since 8 + 5 + 7 + 1 + 2 + 94 + 539 + 5 + 5 = 666.

It is not a de Polignac number, because 857129453955 - 2¹⁰ = 857129452931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857129453892 and 857129453901.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15064570 + ... + 15121359.

It is an arithmetic number, because the mean of its divisors is an integer number (62001900220).

Almost surely, 2^857129453955 is an apocalyptic number.

857129453955 is a deficient number, since it is larger than the sum of its proper divisors (630916151325).

857129453955 is a wasteful number, since it uses less digits than its factorization.

857129453955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30186571 (or 30186568 counting only the distinct ones).

The product of its digits is 68040000, while the sum is 63.

The spelling of 857129453955 in words is "eight hundred fifty-seven billion, one hundred twenty-nine million, four hundred fifty-three thousand, nine hundred fifty-five".