240914869025821 has 2 divisors, whose sum is σ = 240914869025822. Its totient is φ = 240914869025820.

The previous prime is 240914869025777. The next prime is 240914869025833. The reversal of 240914869025821 is 128520968419042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161626725562500 + 79288143463321 = 12713250^2 + 8904389^2 .

It is a cyclic number.

It is not a de Polignac number, because 240914869025821 - 2¹⁵ = 240914868993053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240914869025821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240914869055821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120457434512910 + 120457434512911.

It is an arithmetic number, because the mean of its divisors is an integer number (120457434512911).

Almost surely, 2^{240914869025821} is an apocalyptic number.

It is an amenable number.

240914869025821 is a deficient number, since it is larger than the sum of its proper divisors (1).

240914869025821 is an equidigital number, since it uses as much as digits as its factorization.

240914869025821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19906560, while the sum is 61.

The spelling of 240914869025821 in words is "two hundred forty trillion, nine hundred fourteen billion, eight hundred sixty-nine million, twenty-five thousand, eight hundred twenty-one".