41451307991 has 4 divisors (see below), whose sum is σ = 43632955800. Its totient is φ = 39269660184.

The previous prime is 41451307973. The next prime is 41451308027. The reversal of 41451307991 is 19970315414.

It is a happy number.

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 41451307991 - 2¹⁸ = 41451045847 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 (41451357991) 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 3 ways as a sum of consecutive naturals, for example, 1090823876 + ... + 1090823913.

It is an arithmetic number, because the mean of its divisors is an integer number (10908238950).

Almost surely, 2^41451307991 is an apocalyptic number.

41451307991 is a deficient number, since it is larger than the sum of its proper divisors (2181647809).

41451307991 is a wasteful number, since it uses less digits than its factorization.

41451307991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181647808.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 41451307991 in words is "forty-one billion, four hundred fifty-one million, three hundred seven thousand, nine hundred ninety-one".