1940948918669 has 2 divisors, whose sum is σ = 1940948918670. Its totient is φ = 1940948918668.

The previous prime is 1940948918663. The next prime is 1940948918761. The reversal of 1940948918669 is 9668198490491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1746000177769 + 194948740900 = 1321363^2 + 441530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940948918669 - 2²⁸ = 1940680483213 is a prime.

It is a super-2 number, since 2×1940948918669² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1940948918596 and 1940948918605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940948918663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970474459334 + 970474459335.

It is an arithmetic number, because the mean of its divisors is an integer number (970474459335).

Almost surely, 2^{1940948918669} is an apocalyptic number.

It is an amenable number.

1940948918669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940948918669 is an equidigital number, since it uses as much as digits as its factorization.

1940948918669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241864704, while the sum is 74.

The spelling of 1940948918669 in words is "one trillion, nine hundred forty billion, nine hundred forty-eight million, nine hundred eighteen thousand, six hundred sixty-nine".