40531634665 has 8 divisors (see below), whose sum is σ = 49769077248. Its totient is φ = 31671230640.

The previous prime is 40531634599. The next prime is 40531634713. The reversal of 40531634665 is 56643613504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40531634665 - 2²¹ = 40529537513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94259401 + ... + 94259830.

It is an arithmetic number, because the mean of its divisors is an integer number (6221134656).

Almost surely, 2^40531634665 is an apocalyptic number.

It is an amenable number.

40531634665 is a deficient number, since it is larger than the sum of its proper divisors (9237442583).

40531634665 is a wasteful number, since it uses less digits than its factorization.

40531634665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188519279.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 40531634665 in words is "forty billion, five hundred thirty-one million, six hundred thirty-four thousand, six hundred sixty-five".