40171461645 has 32 divisors (see below), whose sum is σ = 77322516480. Its totient is φ = 17397564480.

The previous prime is 40171461643. The next prime is 40171461679. The reversal of 40171461645 is 54616417104.

It is not a de Polignac number, because 40171461645 - 2¹ = 40171461643 is a prime.

It is a super-3 number, since 3×40171461645³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40171461641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10066041 + ... + 10070030.

It is an arithmetic number, because the mean of its divisors is an integer number (2416328640).

Almost surely, 2^40171461645 is an apocalyptic number.

It is an amenable number.

40171461645 is a deficient number, since it is larger than the sum of its proper divisors (37151054835).

40171461645 is a wasteful number, since it uses less digits than its factorization.

40171461645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20136105.

The product of its (nonzero) digits is 80640, while the sum is 39.

Adding to 40171461645 its reverse (54616417104), we get a palindrome (94787878749).

The spelling of 40171461645 in words is "forty billion, one hundred seventy-one million, four hundred sixty-one thousand, six hundred forty-five".