849205287901 has 4 divisors (see below), whose sum is σ = 849210920032. Its totient is φ = 849199655772.

The previous prime is 849205287881. The next prime is 849205287911. The reversal of 849205287901 is 109782502948.

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 849205287901 - 2⁷ = 849205287773 is a prime.

It is a super-2 number, since 2×849205287901² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849205287911) 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, 2583495 + ... + 2893588.

It is an arithmetic number, because the mean of its divisors is an integer number (212302730008).

Almost surely, 2^849205287901 is an apocalyptic number.

It is an amenable number.

849205287901 is a deficient number, since it is larger than the sum of its proper divisors (5632131).

849205287901 is a wasteful number, since it uses less digits than its factorization.

849205287901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632130.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 849205287901 in words is "eight hundred forty-nine billion, two hundred five million, two hundred eighty-seven thousand, nine hundred one".