40958981009 has 2 divisors, whose sum is σ = 40958981010. Its totient is φ = 40958981008.

The previous prime is 40958980969. The next prime is 40958981033. The reversal of 40958981009 is 90018985904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29371104400 + 11587876609 = 171380^2 + 107647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40958981009 is a prime.

It is not a weakly prime, because it can be changed into another prime (40958981069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20479490504 + 20479490505.

It is an arithmetic number, because the mean of its divisors is an integer number (20479490505).

Almost surely, 2^40958981009 is an apocalyptic number.

It is an amenable number.

40958981009 is a deficient number, since it is larger than the sum of its proper divisors (1).

40958981009 is an equidigital number, since it uses as much as digits as its factorization.

40958981009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 40958981009 in words is "forty billion, nine hundred fifty-eight million, nine hundred eighty-one thousand, nine".