40111712621 has 2 divisors, whose sum is σ = 40111712622. Its totient is φ = 40111712620.

The previous prime is 40111712561. The next prime is 40111712647. The reversal of 40111712621 is 12621711104.

40111712621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (40111712647) can be obtained adding 40111712621 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23163318025 + 16948394596 = 152195^2 + 130186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40111712621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40111712681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20055856310 + 20055856311.

It is an arithmetic number, because the mean of its divisors is an integer number (20055856311).

Almost surely, 2^40111712621 is an apocalyptic number.

It is an amenable number.

40111712621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40111712621 is an equidigital number, since it uses as much as digits as its factorization.

40111712621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The spelling of 40111712621 in words is "forty billion, one hundred eleven million, seven hundred twelve thousand, six hundred twenty-one".