1945827641 has 2 divisors, whose sum is σ = 1945827642. Its totient is φ = 1945827640.

The previous prime is 1945827617. The next prime is 1945827661. The reversal of 1945827641 is 1467285491.

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., 1886599225 + 59228416 = 43435^2 + 7696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1945827641 - 2³⁰ = 872085817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1945827661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972913820 + 972913821.

It is an arithmetic number, because the mean of its divisors is an integer number (972913821).

Almost surely, 2^1945827641 is an apocalyptic number.

It is an amenable number.

1945827641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945827641 is an equidigital number, since it uses as much as digits as its factorization.

1945827641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 1945827641 is about 44111.5363708860. The cubic root of 1945827641 is about 1248.4412872195.

The spelling of 1945827641 in words is "one billion, nine hundred forty-five million, eight hundred twenty-seven thousand, six hundred forty-one".