1943745642 has 24 divisors (see below), whose sum is σ = 4325273316. Its totient is φ = 630403776.

The previous prime is 1943745637. The next prime is 1943745647. The reversal of 1943745642 is 2465473491.

1943745642 is a `hidden beast` number, since 19 + 4 + 3 + 74 + 564 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1943745637) and next prime (1943745647).

It can be written as a sum of positive squares in 2 ways, for example, as 1612905921 + 330839721 = 40161^2 + 18189^2 .

It is not an unprimeable number, because it can be changed into a prime (1943745647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1458603 + ... + 1459934.

Almost surely, 2^1943745642 is an apocalyptic number.

1943745642 is an abundant number, since it is smaller than the sum of its proper divisors (2381527674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1943745642 is a wasteful number, since it uses less digits than its factorization.

1943745642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918582 (or 2918579 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 1943745642 is about 44087.9307974416. The cubic root of 1943745642 is about 1247.9958587449.

The spelling of 1943745642 in words is "one billion, nine hundred forty-three million, seven hundred forty-five thousand, six hundred forty-two".