720261851 has 2 divisors, whose sum is σ = 720261852. Its totient is φ = 720261850.

The previous prime is 720261821. The next prime is 720261907. The reversal of 720261851 is 158162027.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720261851 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (720261821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360130925 + 360130926.

It is an arithmetic number, because the mean of its divisors is an integer number (360130926).

Almost surely, 2^720261851 is an apocalyptic number.

720261851 is a deficient number, since it is larger than the sum of its proper divisors (1).

720261851 is an equidigital number, since it uses as much as digits as its factorization.

720261851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 720261851 is about 26837.6945917491. The cubic root of 720261851 is about 896.3895898751.

The spelling of 720261851 in words is "seven hundred twenty million, two hundred sixty-one thousand, eight hundred fifty-one".