857452812125490 has 96 divisors (see below), whose sum is σ = 2567921672908800. Its totient is φ = 194445992022912.

The previous prime is 857452812125419. The next prime is 857452812125509. The reversal of 857452812125490 is 94521218254758.

It is a happy number.

857452812125490 is a `hidden beast` number, since 8 + 5 + 7 + 4 + 5 + 2 + 8 + 12 + 125 + 490 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5358330265 + ... + 5358490284.

It is an arithmetic number, because the mean of its divisors is an integer number (26749184092800).

Almost surely, 2^{857452812125490} is an apocalyptic number.

857452812125490 is an abundant number, since it is smaller than the sum of its proper divisors (1710468860783310).

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

857452812125490 is a wasteful number, since it uses less digits than its factorization.

857452812125490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716820696 (or 10716820693 counting only the distinct ones).

The product of its (nonzero) digits is 64512000, while the sum is 63.

The spelling of 857452812125490 in words is "eight hundred fifty-seven trillion, four hundred fifty-two billion, eight hundred twelve million, one hundred twenty-five thousand, four hundred ninety".