857780253109 has 32 divisors (see below), whose sum is σ = 975137587200. Its totient is φ = 748000785600.

The previous prime is 857780253103. The next prime is 857780253131. The reversal of 857780253109 is 901352087758.

It is not a de Polignac number, because 857780253109 - 2¹⁷ = 857780122037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857780253109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857780253103) 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, 300868534 + ... + 300871384.

It is an arithmetic number, because the mean of its divisors is an integer number (30473049600).

Almost surely, 2^857780253109 is an apocalyptic number.

It is an amenable number.

857780253109 is a deficient number, since it is larger than the sum of its proper divisors (117357334091).

857780253109 is a wasteful number, since it uses less digits than its factorization.

857780253109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 857780253109 in words is "eight hundred fifty-seven billion, seven hundred eighty million, two hundred fifty-three thousand, one hundred nine".