40845081671 has 4 divisors (see below), whose sum is σ = 43247733552. Its totient is φ = 38442429792.

The previous prime is 40845081653. The next prime is 40845081709. The reversal of 40845081671 is 17618054804.

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 40845081671 - 2¹⁸ = 40844819527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40845081371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201325915 + ... + 1201325948.

It is an arithmetic number, because the mean of its divisors is an integer number (10811933388).

Almost surely, 2^40845081671 is an apocalyptic number.

40845081671 is a deficient number, since it is larger than the sum of its proper divisors (2402651881).

40845081671 is a wasteful number, since it uses less digits than its factorization.

40845081671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402651880.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 40845081671 in words is "forty billion, eight hundred forty-five million, eighty-one thousand, six hundred seventy-one".