518589797642 has 12 divisors (see below), whose sum is σ = 904886279730. Its totient is φ = 222252770376.

The previous prime is 518589797573. The next prime is 518589797657. The reversal of 518589797642 is 246797985815.

It can be written as a sum of positive squares in only one way, i.e., 497802213601 + 20787584041 = 705551^2 + 144179^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2645866217 + ... + 2645866412.

Almost surely, 2^518589797642 is an apocalyptic number.

518589797642 is a deficient number, since it is larger than the sum of its proper divisors (386296482088).

518589797642 is a wasteful number, since it uses less digits than its factorization.

518589797642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291732645 (or 5291732638 counting only the distinct ones).

The product of its digits is 304819200, while the sum is 71.

The spelling of 518589797642 in words is "five hundred eighteen billion, five hundred eighty-nine million, seven hundred ninety-seven thousand, six hundred forty-two".