2391758103961 has 2 divisors, whose sum is σ = 2391758103962. Its totient is φ = 2391758103960.

The previous prime is 2391758103937. The next prime is 2391758104061. The reversal of 2391758103961 is 1693018571932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2327589614736 + 64168489225 = 1525644^2 + 253315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391758103961 - 2¹¹ = 2391758101913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2391758103901) 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, 1195879051980 + 1195879051981.

It is an arithmetic number, because the mean of its divisors is an integer number (1195879051981).

Almost surely, 2^{2391758103961} is an apocalyptic number.

It is an amenable number.

2391758103961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391758103961 is an equidigital number, since it uses as much as digits as its factorization.

2391758103961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 2391758103961 in words is "two trillion, three hundred ninety-one billion, seven hundred fifty-eight million, one hundred three thousand, nine hundred sixty-one".