721501458079 has 2 divisors, whose sum is σ = 721501458080. Its totient is φ = 721501458078.

The previous prime is 721501458047. The next prime is 721501458101. The reversal of 721501458079 is 970854105127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721501458079 - 2⁵ = 721501458047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721501458179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360750729039 + 360750729040.

It is an arithmetic number, because the mean of its divisors is an integer number (360750729040).

Almost surely, 2^721501458079 is an apocalyptic number.

721501458079 is a deficient number, since it is larger than the sum of its proper divisors (1).

721501458079 is an equidigital number, since it uses as much as digits as its factorization.

721501458079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 721501458079 in words is "seven hundred twenty-one billion, five hundred one million, four hundred fifty-eight thousand, seventy-nine".