40415662421 has 2 divisors, whose sum is σ = 40415662422. Its totient is φ = 40415662420.

The previous prime is 40415662411. The next prime is 40415662433. The reversal of 40415662421 is 12426651404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33611722225 + 6803940196 = 183335^2 + 82486^2 .

It is a cyclic number.

It is not a de Polignac number, because 40415662421 - 2³⁴ = 23235793237 is a prime.

It is a super-3 number, since 3×40415662421³ (a number of 33 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40415662411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20207831210 + 20207831211.

It is an arithmetic number, because the mean of its divisors is an integer number (20207831211).

Almost surely, 2^40415662421 is an apocalyptic number.

It is an amenable number.

40415662421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40415662421 is an equidigital number, since it uses as much as digits as its factorization.

40415662421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 40415662421 in words is "forty billion, four hundred fifteen million, six hundred sixty-two thousand, four hundred twenty-one".