855148643 has 4 divisors (see below), whose sum is σ = 855208368. Its totient is φ = 855088920.

The previous prime is 855148639. The next prime is 855148667. The reversal of 855148643 is 346841558.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 855148643 - 2² = 855148639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 855148594 and 855148603.

It is not an unprimeable number, because it can be changed into a prime (855148633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5858 + ... + 41768.

It is an arithmetic number, because the mean of its divisors is an integer number (213802092).

Almost surely, 2^855148643 is an apocalyptic number.

855148643 is a deficient number, since it is larger than the sum of its proper divisors (59725).

855148643 is a wasteful number, since it uses less digits than its factorization.

855148643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59724.

The product of its digits is 460800, while the sum is 44.

The square root of 855148643 is about 29242.9246656349. The cubic root of 855148643 is about 949.1769946980.

The spelling of 855148643 in words is "eight hundred fifty-five million, one hundred forty-eight thousand, six hundred forty-three".