40621413409 has 2 divisors, whose sum is σ = 40621413410. Its totient is φ = 40621413408.

The previous prime is 40621413401. The next prime is 40621413463. The reversal of 40621413409 is 90431412604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32488981009 + 8132432400 = 180247^2 + 90180^2 .

It is a cyclic number.

It is not a de Polignac number, because 40621413409 - 2³ = 40621413401 is a prime.

It is not a weakly prime, because it can be changed into another prime (40621413401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20310706704 + 20310706705.

It is an arithmetic number, because the mean of its divisors is an integer number (20310706705).

Almost surely, 2^40621413409 is an apocalyptic number.

It is an amenable number.

40621413409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40621413409 is an equidigital number, since it uses as much as digits as its factorization.

40621413409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 40621413409 in words is "forty billion, six hundred twenty-one million, four hundred thirteen thousand, four hundred nine".