40108585347421 has 2 divisors, whose sum is σ = 40108585347422. Its totient is φ = 40108585347420.

The previous prime is 40108585347361. The next prime is 40108585347427. The reversal of 40108585347421 is 12474358580104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38421885734521 + 1686699612900 = 6198539^2 + 1298730^2 .

It is a cyclic number.

It is not a de Polignac number, because 40108585347421 - 2⁷ = 40108585347293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40108585347427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20054292673710 + 20054292673711.

It is an arithmetic number, because the mean of its divisors is an integer number (20054292673711).

Almost surely, 2^{40108585347421} is an apocalyptic number.

It is an amenable number.

40108585347421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40108585347421 is an equidigital number, since it uses as much as digits as its factorization.

40108585347421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4300800, while the sum is 52.

The spelling of 40108585347421 in words is "forty trillion, one hundred eight billion, five hundred eighty-five million, three hundred forty-seven thousand, four hundred twenty-one".