1950745681 has 2 divisors, whose sum is σ = 1950745682. Its totient is φ = 1950745680.

The previous prime is 1950745673. The next prime is 1950745703. The reversal of 1950745681 is 1865470591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1382352400 + 568393281 = 37180^2 + 23841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1950745681 - 2³ = 1950745673 is a prime.

It is a super-2 number, since 2×1950745681² = 7610817423880307522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1950745651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975372840 + 975372841.

It is an arithmetic number, because the mean of its divisors is an integer number (975372841).

Almost surely, 2^1950745681 is an apocalyptic number.

It is an amenable number.

1950745681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1950745681 is an equidigital number, since it uses as much as digits as its factorization.

1950745681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 1950745681 is about 44167.2466993359. The cubic root of 1950745681 is about 1249.4922056906.

The spelling of 1950745681 in words is "one billion, nine hundred fifty million, seven hundred forty-five thousand, six hundred eighty-one".