40591744667 has 2 divisors, whose sum is σ = 40591744668. Its totient is φ = 40591744666.

The previous prime is 40591744663. The next prime is 40591744811. The reversal of 40591744667 is 76644719504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40591744667 - 2² = 40591744663 is a prime.

It is a super-2 number, since 2×40591744667² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40591744663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20295872333 + 20295872334.

It is an arithmetic number, because the mean of its divisors is an integer number (20295872334).

Almost surely, 2^40591744667 is an apocalyptic number.

40591744667 is a deficient number, since it is larger than the sum of its proper divisors (1).

40591744667 is an equidigital number, since it uses as much as digits as its factorization.

40591744667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 40591744667 in words is "forty billion, five hundred ninety-one million, seven hundred forty-four thousand, six hundred sixty-seven".