721543043232967 has 2 divisors, whose sum is σ = 721543043232968. Its totient is φ = 721543043232966.

The previous prime is 721543043232929. The next prime is 721543043233009. The reversal of 721543043232967 is 769232340345127.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721543043232967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721543043232917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360771521616483 + 360771521616484.

It is an arithmetic number, because the mean of its divisors is an integer number (360771521616484).

Almost surely, 2^{721543043232967} is an apocalyptic number.

721543043232967 is a deficient number, since it is larger than the sum of its proper divisors (1).

721543043232967 is an equidigital number, since it uses as much as digits as its factorization.

721543043232967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 58.

The spelling of 721543043232967 in words is "seven hundred twenty-one trillion, five hundred forty-three billion, forty-three million, two hundred thirty-two thousand, nine hundred sixty-seven".