721459409851 has 2 divisors, whose sum is σ = 721459409852. Its totient is φ = 721459409850.

The previous prime is 721459409819. The next prime is 721459409863. The reversal of 721459409851 is 158904954127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721459409851 - 2⁵ = 721459409819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 721459409792 and 721459409801.

It is not a weakly prime, because it can be changed into another prime (721459409051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360729704925 + 360729704926.

It is an arithmetic number, because the mean of its divisors is an integer number (360729704926).

Almost surely, 2^721459409851 is an apocalyptic number.

721459409851 is a deficient number, since it is larger than the sum of its proper divisors (1).

721459409851 is an equidigital number, since it uses as much as digits as its factorization.

721459409851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 721459409851 in words is "seven hundred twenty-one billion, four hundred fifty-nine million, four hundred nine thousand, eight hundred fifty-one".