43630726261 has 2 divisors, whose sum is σ = 43630726262. Its totient is φ = 43630726260.

The previous prime is 43630726189. The next prime is 43630726301. The reversal of 43630726261 is 16262703634.

It is an a-pointer prime, because the next prime (43630726301) can be obtained adding 43630726261 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43480173361 + 150552900 = 208519^2 + 12270^2 .

It is a cyclic number.

It is not a de Polignac number, because 43630726261 - 2¹³ = 43630718069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43630721261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21815363130 + 21815363131.

It is an arithmetic number, because the mean of its divisors is an integer number (21815363131).

Almost surely, 2^43630726261 is an apocalyptic number.

It is an amenable number.

43630726261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43630726261 is an equidigital number, since it uses as much as digits as its factorization.

43630726261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 43630726261 in words is "forty-three billion, six hundred thirty million, seven hundred twenty-six thousand, two hundred sixty-one".