857149322496 has 288 divisors, whose sum is σ = 2351685772800. Its totient is φ = 277072773120.

The previous prime is 857149322489. The next prime is 857149322509. The reversal of 857149322496 is 694223941758.

It is a happy number.

It is a super-2 number, since 2×857149322496² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 977364810 + ... + 977365686.

It is an arithmetic number, because the mean of its divisors is an integer number (8165575600).

Almost surely, 2^857149322496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857149322496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175842886400).

857149322496 is an abundant number, since it is smaller than the sum of its proper divisors (1494536450304).

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

857149322496 is a wasteful number, since it uses less digits than its factorization.

857149322496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1231 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 60.

The spelling of 857149322496 in words is "eight hundred fifty-seven billion, one hundred forty-nine million, three hundred twenty-two thousand, four hundred ninety-six".