855371649 has 8 divisors (see below), whose sum is σ = 1244176992.
Its totient is φ = 518407040.
The previous prime is 855371603. The next prime is 855371681. The reversal of 855371649 is 946173558.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 855371649 - 27 = 855371521 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 855371598 and 855371607.
It is not an unprimeable number, because it can be changed into a prime (855371549) 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 7 ways as a sum of consecutive naturals, for example, 12960144 + ... + 12960209.
It is an arithmetic number, because the mean of its divisors is an integer number (155522124).
Almost surely, 2855371649 is an apocalyptic number.
It is an amenable number.
855371649 is a deficient number, since it is larger than the sum of its proper divisors (388805343).
855371649 is a wasteful number, since it uses less digits than its factorization.
855371649 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 25920367.
The product of its digits is 907200, while the sum is 48.
The square root of 855371649 is about 29246.7374077862.
The cubic root of 855371649 is about 949.2594964437.
The spelling of 855371649 in words is "eight hundred fifty-five million, three hundred seventy-one thousand, six hundred forty-nine".