440460667991 has 2 divisors, whose sum is σ = 440460667992. Its totient is φ = 440460667990.

The previous prime is 440460667963. The next prime is 440460668027. The reversal of 440460667991 is 199766064044.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440460667991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440460667951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220230333995 + 220230333996.

It is an arithmetic number, because the mean of its divisors is an integer number (220230333996).

Almost surely, 2^440460667991 is an apocalyptic number.

440460667991 is a deficient number, since it is larger than the sum of its proper divisors (1).

440460667991 is an equidigital number, since it uses as much as digits as its factorization.

440460667991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 440460667991 in words is "four hundred forty billion, four hundred sixty million, six hundred sixty-seven thousand, nine hundred ninety-one".