1940419607381 has 2 divisors, whose sum is σ = 1940419607382. Its totient is φ = 1940419607380.

The previous prime is 1940419607363. The next prime is 1940419607419. The reversal of 1940419607381 is 1837069140491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1935632212900 + 4787394481 = 1391270^2 + 69191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940419607381 - 2¹⁴ = 1940419590997 is a prime.

It is a super-2 number, since 2×1940419607381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940419307381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970209803690 + 970209803691.

It is an arithmetic number, because the mean of its divisors is an integer number (970209803691).

Almost surely, 2^{1940419607381} is an apocalyptic number.

It is an amenable number.

1940419607381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940419607381 is an equidigital number, since it uses as much as digits as its factorization.

1940419607381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 1940419607381 in words is "one trillion, nine hundred forty billion, four hundred nineteen million, six hundred seven thousand, three hundred eighty-one".