41854145891 has 4 divisors (see below), whose sum is σ = 42052506984. Its totient is φ = 41655784800.

The previous prime is 41854145887. The next prime is 41854145917. The reversal of 41854145891 is 19854145814.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 41854145891 - 2² = 41854145887 is a prime.

It is a super-2 number, since 2×41854145891² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41854145831) 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, 99180230 + ... + 99180651.

It is an arithmetic number, because the mean of its divisors is an integer number (10513126746).

Almost surely, 2^41854145891 is an apocalyptic number.

41854145891 is a deficient number, since it is larger than the sum of its proper divisors (198361093).

41854145891 is a wasteful number, since it uses less digits than its factorization.

41854145891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198361092.

The product of its digits is 921600, while the sum is 50.

The spelling of 41854145891 in words is "forty-one billion, eight hundred fifty-four million, one hundred forty-five thousand, eight hundred ninety-one".