1642135775 has 36 divisors (see below), whose sum is σ = 2389860432. Its totient is φ = 1115976960.

The previous prime is 1642135771. The next prime is 1642135793. The reversal of 1642135775 is 5775312461.

It is not a de Polignac number, because 1642135775 - 2² = 1642135771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642135771) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 132494 + ... + 144356.

It is an arithmetic number, because the mean of its divisors is an integer number (66385012).

Almost surely, 2^1642135775 is an apocalyptic number.

1642135775 is a deficient number, since it is larger than the sum of its proper divisors (747724657).

1642135775 is a wasteful number, since it uses less digits than its factorization.

1642135775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12000 (or 11988 counting only the distinct ones).

The product of its digits is 176400, while the sum is 41.

The square root of 1642135775 is about 40523.2744851647. The cubic root of 1642135775 is about 1179.7854093641.

The spelling of 1642135775 in words is "one billion, six hundred forty-two million, one hundred thirty-five thousand, seven hundred seventy-five".