1642515849 has 24 divisors (see below), whose sum is σ = 2614451840. Its totient is φ = 987269472.

The previous prime is 1642515839. The next prime is 1642515863. The reversal of 1642515849 is 9485152461.

1642515849 is a `hidden beast` number, since 1 + 64 + 2 + 5 + 1 + 584 + 9 = 666.

It is not a de Polignac number, because 1642515849 - 2⁸ = 1642515593 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1642515839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158209 + ... + 168270.

Almost surely, 2^1642515849 is an apocalyptic number.

It is an amenable number.

1642515849 is a deficient number, since it is larger than the sum of its proper divisors (971935991).

1642515849 is a wasteful number, since it uses less digits than its factorization.

1642515849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326541 (or 326538 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 1642515849 is about 40527.9637904497. The cubic root of 1642515849 is about 1179.8764231882.

The spelling of 1642515849 in words is "one billion, six hundred forty-two million, five hundred fifteen thousand, eight hundred forty-nine".