857501309444 has 48 divisors (see below), whose sum is σ = 1727453589120. Its totient is φ = 369329199360.

The previous prime is 857501309377. The next prime is 857501309447. The reversal of 857501309444 is 444903105758.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 857501309392 and 857501309401.

It is not an unprimeable number, because it can be changed into a prime (857501309447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8694554 + ... + 8792625.

It is an arithmetic number, because the mean of its divisors is an integer number (35988616440).

Almost surely, 2^857501309444 is an apocalyptic number.

It is an amenable number.

857501309444 is an abundant number, since it is smaller than the sum of its proper divisors (869952279676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857501309444 is a wasteful number, since it uses less digits than its factorization.

857501309444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17487260 (or 17487258 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 857501309444 in words is "eight hundred fifty-seven billion, five hundred one million, three hundred nine thousand, four hundred forty-four".