40320411999961 has 2 divisors, whose sum is σ = 40320411999962. Its totient is φ = 40320411999960.

The previous prime is 40320411999893. The next prime is 40320412000081. The reversal of 40320411999961 is 16999911402304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28831057735936 + 11489354264025 = 5369456^2 + 3389595^2 .

It is a cyclic number.

It is not a de Polignac number, because 40320411999961 - 2¹⁵ = 40320411967193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40320411999896 and 40320411999905.

It is not a weakly prime, because it can be changed into another prime (40320411990961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160205999980 + 20160205999981.

It is an arithmetic number, because the mean of its divisors is an integer number (20160205999981).

Almost surely, 2^{40320411999961} is an apocalyptic number.

It is an amenable number.

40320411999961 is a deficient number, since it is larger than the sum of its proper divisors (1).

40320411999961 is an equidigital number, since it uses as much as digits as its factorization.

40320411999961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The spelling of 40320411999961 in words is "forty trillion, three hundred twenty billion, four hundred eleven million, nine hundred ninety-nine thousand, nine hundred sixty-one".