720518213461 has 2 divisors, whose sum is σ = 720518213462. Its totient is φ = 720518213460.

The previous prime is 720518213447. The next prime is 720518213479. The reversal of 720518213461 is 164312815027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647405298225 + 73112915236 = 804615^2 + 270394^2 .

It is a cyclic number.

It is not a de Polignac number, because 720518213461 - 2¹⁵ = 720518180693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720518214461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360259106730 + 360259106731.

It is an arithmetic number, because the mean of its divisors is an integer number (360259106731).

Almost surely, 2^720518213461 is an apocalyptic number.

It is an amenable number.

720518213461 is a deficient number, since it is larger than the sum of its proper divisors (1).

720518213461 is an equidigital number, since it uses as much as digits as its factorization.

720518213461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 720518213461 in words is "seven hundred twenty billion, five hundred eighteen million, two hundred thirteen thousand, four hundred sixty-one".