43796721811 has 2 divisors, whose sum is σ = 43796721812. Its totient is φ = 43796721810.

The previous prime is 43796721797. The next prime is 43796721847. The reversal of 43796721811 is 11812769734.

43796721811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43796721811 is a prime.

It is not a weakly prime, because it can be changed into another prime (43796721211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21898360905 + 21898360906.

It is an arithmetic number, because the mean of its divisors is an integer number (21898360906).

Almost surely, 2^43796721811 is an apocalyptic number.

43796721811 is a deficient number, since it is larger than the sum of its proper divisors (1).

43796721811 is an equidigital number, since it uses as much as digits as its factorization.

43796721811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The spelling of 43796721811 in words is "forty-three billion, seven hundred ninety-six million, seven hundred twenty-one thousand, eight hundred eleven".