40651145891 has 2 divisors, whose sum is σ = 40651145892. Its totient is φ = 40651145890.

The previous prime is 40651145861. The next prime is 40651145911. The reversal of 40651145891 is 19854115604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40651145891 - 2⁶ = 40651145827 is a prime.

It is not a weakly prime, because it can be changed into another prime (40651145851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20325572945 + 20325572946.

It is an arithmetic number, because the mean of its divisors is an integer number (20325572946).

Almost surely, 2^40651145891 is an apocalyptic number.

40651145891 is a deficient number, since it is larger than the sum of its proper divisors (1).

40651145891 is an equidigital number, since it uses as much as digits as its factorization.

40651145891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 40651145891 in words is "forty billion, six hundred fifty-one million, one hundred forty-five thousand, eight hundred ninety-one".