857918996529 has 16 divisors (see below), whose sum is σ = 1319522946048. Its totient is φ = 485657748432.

The previous prime is 857918996521. The next prime is 857918996531. The reversal of 857918996529 is 925699819758.

It is not a de Polignac number, because 857918996529 - 2³ = 857918996521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857918996521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190900957 + ... + 190905450.

It is an arithmetic number, because the mean of its divisors is an integer number (82470184128).

Almost surely, 2^857918996529 is an apocalyptic number.

It is an amenable number.

857918996529 is a deficient number, since it is larger than the sum of its proper divisors (461603949519).

857918996529 is a wasteful number, since it uses less digits than its factorization.

857918996529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381806524.

The product of its digits is 881798400, while the sum is 78.

The spelling of 857918996529 in words is "eight hundred fifty-seven billion, nine hundred eighteen million, nine hundred ninety-six thousand, five hundred twenty-nine".