857644254339 has 32 divisors (see below), whose sum is σ = 1227439077120. Its totient is φ = 531009468288.

The previous prime is 857644254307. The next prime is 857644254361. The reversal of 857644254339 is 933452446758.

857644254339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 857644254339 - 2⁵ = 857644254307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857644254239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3547452 + ... + 3781494.

It is an arithmetic number, because the mean of its divisors is an integer number (38357471160).

Almost surely, 2^857644254339 is an apocalyptic number.

857644254339 is a deficient number, since it is larger than the sum of its proper divisors (369794822781).

857644254339 is a wasteful number, since it uses less digits than its factorization.

857644254339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235331.

The product of its digits is 87091200, while the sum is 60.

The spelling of 857644254339 in words is "eight hundred fifty-seven billion, six hundred forty-four million, two hundred fifty-four thousand, three hundred thirty-nine".