40891835651 has 4 divisors (see below), whose sum is σ = 40975118904. Its totient is φ = 40808552400.

The previous prime is 40891835641. The next prime is 40891835669. The reversal of 40891835651 is 15653819804.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40891835651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40891835651.

It is not an unprimeable number, because it can be changed into a prime (40891835641) 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, 41640890 + ... + 41641871.

It is an arithmetic number, because the mean of its divisors is an integer number (10243779726).

Almost surely, 2^40891835651 is an apocalyptic number.

40891835651 is a deficient number, since it is larger than the sum of its proper divisors (83283253).

40891835651 is an equidigital number, since it uses as much as digits as its factorization.

40891835651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83283252.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 40891835651 in words is "forty billion, eight hundred ninety-one million, eight hundred thirty-five thousand, six hundred fifty-one".