855378693522 has 96 divisors (see below), whose sum is σ = 2052341928000. Its totient is φ = 256384517760.

The previous prime is 855378693509. The next prime is 855378693523. The reversal of 855378693522 is 225396873558.

855378693522 is a `hidden beast` number, since 8 + 5 + 537 + 8 + 6 + 93 + 5 + 2 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 855378693522.

It is not an unprimeable number, because it can be changed into a prime (855378693523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145729 + ... + 1316052.

It is an arithmetic number, because the mean of its divisors is an integer number (21378561750).

Almost surely, 2^855378693522 is an apocalyptic number.

855378693522 is an abundant number, since it is smaller than the sum of its proper divisors (1196963234478).

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

855378693522 is a wasteful number, since it uses less digits than its factorization.

855378693522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461896 (or 1461893 counting only the distinct ones).

The product of its digits is 108864000, while the sum is 63.

The spelling of 855378693522 in words is "eight hundred fifty-five billion, three hundred seventy-eight million, six hundred ninety-three thousand, five hundred twenty-two".