1851832642 has 24 divisors (see below), whose sum is σ = 3158523900. Its totient is φ = 812713440.

The previous prime is 1851832589. The next prime is 1851832651. The reversal of 1851832642 is 2462381581.

It can be written as a sum of positive squares in 2 ways, for example, as 1811268481 + 40564161 = 42559^2 + 6369^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1851832595 and 1851832604.

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, 124917 + ... + 138952.

Almost surely, 2^1851832642 is an apocalyptic number.

1851832642 is a deficient number, since it is larger than the sum of its proper divisors (1306691258).

1851832642 is a wasteful number, since it uses less digits than its factorization.

1851832642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263922 (or 263911 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 1851832642 is about 43032.9250923058. The cubic root of 1851832642 is about 1228.0062533502.

The spelling of 1851832642 in words is "one billion, eight hundred fifty-one million, eight hundred thirty-two thousand, six hundred forty-two".