40185471671 has 4 divisors (see below), whose sum is σ = 40341835632. Its totient is φ = 40029107712.

The previous prime is 40185471643. The next prime is 40185471701. The reversal of 40185471671 is 17617458104.

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 40185471671 - 2¹⁸ = 40185209527 is a prime.

It is a super-2 number, since 2×40185471671² (a number of 22 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 (40185471611) 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, 78181595 + ... + 78182108.

It is an arithmetic number, because the mean of its divisors is an integer number (10085458908).

Almost surely, 2^40185471671 is an apocalyptic number.

40185471671 is a deficient number, since it is larger than the sum of its proper divisors (156363961).

40185471671 is a wasteful number, since it uses less digits than its factorization.

40185471671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156363960.

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 40185471671 in words is "forty billion, one hundred eighty-five million, four hundred seventy-one thousand, six hundred seventy-one".