40521144137 has 2 divisors, whose sum is σ = 40521144138. Its totient is φ = 40521144136.

The previous prime is 40521144077. The next prime is 40521144193. The reversal of 40521144137 is 73144112504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38915058361 + 1606085776 = 197269^2 + 40076^2 .

It is a cyclic number.

It is not a de Polignac number, because 40521144137 - 2¹⁶ = 40521078601 is a prime.

It is not a weakly prime, because it can be changed into another prime (40521174137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260572068 + 20260572069.

It is an arithmetic number, because the mean of its divisors is an integer number (20260572069).

Almost surely, 2^40521144137 is an apocalyptic number.

It is an amenable number.

40521144137 is a deficient number, since it is larger than the sum of its proper divisors (1).

40521144137 is an equidigital number, since it uses as much as digits as its factorization.

40521144137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 40521144137 in words is "forty billion, five hundred twenty-one million, one hundred forty-four thousand, one hundred thirty-seven".