851195641 has 4 divisors (see below), whose sum is σ = 863184384. Its totient is φ = 839206900.

The previous prime is 851195633. The next prime is 851195651. The reversal of 851195641 is 146591158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 851195641 - 2³ = 851195633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 851195594 and 851195603.

It is not an unprimeable number, because it can be changed into a prime (851195651) 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, 5994265 + ... + 5994406.

It is an arithmetic number, because the mean of its divisors is an integer number (215796096).

Almost surely, 2^851195641 is an apocalyptic number.

It is an amenable number.

851195641 is a deficient number, since it is larger than the sum of its proper divisors (11988743).

851195641 is a wasteful number, since it uses less digits than its factorization.

851195641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11988742.

The product of its digits is 43200, while the sum is 40.

The square root of 851195641 is about 29175.2573424811. The cubic root of 851195641 is about 947.7121831107.

The spelling of 851195641 in words is "eight hundred fifty-one million, one hundred ninety-five thousand, six hundred forty-one".