73220860261 has 2 divisors, whose sum is σ = 73220860262. Its totient is φ = 73220860260.

The previous prime is 73220860243. The next prime is 73220860331. The reversal of 73220860261 is 16206802237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43509788100 + 29711072161 = 208590^2 + 172369^2 .

It is a cyclic number.

It is not a de Polignac number, because 73220860261 - 2⁷ = 73220860133 is a prime.

It is a super-2 number, since 2×73220860261² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73220860261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73220860201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36610430130 + 36610430131.

It is an arithmetic number, because the mean of its divisors is an integer number (36610430131).

Almost surely, 2^73220860261 is an apocalyptic number.

It is an amenable number.

73220860261 is a deficient number, since it is larger than the sum of its proper divisors (1).

73220860261 is an equidigital number, since it uses as much as digits as its factorization.

73220860261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 73220860261 in words is "seventy-three billion, two hundred twenty million, eight hundred sixty thousand, two hundred sixty-one".