218139124959 has 48 divisors (see below), whose sum is σ = 361712565760. Its totient is φ = 124094773440.

The previous prime is 218139124921. The next prime is 218139124979. The reversal of 218139124959 is 959421931812.

It is a happy number.

218139124959 is a `hidden beast` number, since 2 + 1 + 8 + 1 + 391 + 249 + 5 + 9 = 666.

It is not a de Polignac number, because 218139124959 - 2⁷ = 218139124831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218139124979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15152937 + ... + 15167325.

Almost surely, 2^218139124959 is an apocalyptic number.

218139124959 is a deficient number, since it is larger than the sum of its proper divisors (143573440801).

218139124959 is a wasteful number, since it uses less digits than its factorization.

218139124959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15460 (or 15457 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The spelling of 218139124959 in words is "two hundred eighteen billion, one hundred thirty-nine million, one hundred twenty-four thousand, nine hundred fifty-nine".