1941555461 has 2 divisors, whose sum is σ = 1941555462. Its totient is φ = 1941555460.

The previous prime is 1941555449. The next prime is 1941555569. The reversal of 1941555461 is 1645551491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1771904836 + 169650625 = 42094^2 + 13025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941555461 - 2²⁶ = 1874446597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1941555401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970777730 + 970777731.

It is an arithmetic number, because the mean of its divisors is an integer number (970777731).

Almost surely, 2^1941555461 is an apocalyptic number.

It is an amenable number.

1941555461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941555461 is an equidigital number, since it uses as much as digits as its factorization.

1941555461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 41.

The square root of 1941555461 is about 44063.0850145561. The cubic root of 1941555461 is about 1247.5269420944.

The spelling of 1941555461 in words is "one billion, nine hundred forty-one million, five hundred fifty-five thousand, four hundred sixty-one".