1941787665 has 12 divisors (see below), whose sum is σ = 3365765364. Its totient is φ = 1035620064.

The previous prime is 1941787577. The next prime is 1941787697. The reversal of 1941787665 is 5667871491.

1941787665 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 563967504 + 1377820161 = 23748^2 + 37119^2 .

It is not a de Polignac number, because 1941787665 - 2⁹ = 1941787153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21575374 + ... + 21575463.

It is an arithmetic number, because the mean of its divisors is an integer number (280480447).

Almost surely, 2^1941787665 is an apocalyptic number.

1941787665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1941787665 is a deficient number, since it is larger than the sum of its proper divisors (1423977699).

1941787665 is a wasteful number, since it uses less digits than its factorization.

1941787665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43150848 (or 43150845 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 1941787665 is about 44065.7198398029. The cubic root of 1941787665 is about 1247.5766735605.

The spelling of 1941787665 in words is "one billion, nine hundred forty-one million, seven hundred eighty-seven thousand, six hundred sixty-five".