65142979899 has 24 divisors (see below), whose sum is σ = 87998615856. Its totient is φ = 42861168000.

The previous prime is 65142979897. The next prime is 65142979921. The reversal of 65142979899 is 99897924156.

It is not a de Polignac number, because 65142979899 - 2¹ = 65142979897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65142979897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53703417 + ... + 53704629.

It is an arithmetic number, because the mean of its divisors is an integer number (3666608994).

Almost surely, 2^65142979899 is an apocalyptic number.

65142979899 is a deficient number, since it is larger than the sum of its proper divisors (22855635957).

65142979899 is a wasteful number, since it uses less digits than its factorization.

65142979899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159 (or 1738 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 69.

The spelling of 65142979899 in words is "sixty-five billion, one hundred forty-two million, nine hundred seventy-nine thousand, eight hundred ninety-nine".