40361650621 has 2 divisors, whose sum is σ = 40361650622. Its totient is φ = 40361650620.

The previous prime is 40361650559. The next prime is 40361650633. The reversal of 40361650621 is 12605616304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38098745721 + 2262904900 = 195189^2 + 47570^2 .

It is a cyclic number.

It is not a de Polignac number, because 40361650621 - 2¹³ = 40361642429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40361651621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20180825310 + 20180825311.

It is an arithmetic number, because the mean of its divisors is an integer number (20180825311).

Almost surely, 2^40361650621 is an apocalyptic number.

It is an amenable number.

40361650621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40361650621 is an equidigital number, since it uses as much as digits as its factorization.

40361650621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 40361650621 in words is "forty billion, three hundred sixty-one million, six hundred fifty thousand, six hundred twenty-one".