720461813761 has 2 divisors, whose sum is σ = 720461813762. Its totient is φ = 720461813760.

The previous prime is 720461813749. The next prime is 720461813791. The reversal of 720461813761 is 167318164027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720408815361 + 52998400 = 848769^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 720461813761 - 2³⁹ = 170705999873 is a prime.

It is not a weakly prime, because it can be changed into another prime (720461813791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360230906880 + 360230906881.

It is an arithmetic number, because the mean of its divisors is an integer number (360230906881).

Almost surely, 2^720461813761 is an apocalyptic number.

It is an amenable number.

720461813761 is a deficient number, since it is larger than the sum of its proper divisors (1).

720461813761 is an equidigital number, since it uses as much as digits as its factorization.

720461813761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

Adding to 720461813761 its reverse (167318164027), we get a palindrome (887779977788).

The spelling of 720461813761 in words is "seven hundred twenty billion, four hundred sixty-one million, eight hundred thirteen thousand, seven hundred sixty-one".