218432137883458 has 16 divisors (see below), whose sum is σ = 328588204606200. Its totient is φ = 108902738592000.

The previous prime is 218432137883447. The next prime is 218432137883459. The reversal of 218432137883458 is 854388731234812.

It can be written as a sum of positive squares in 4 ways, for example, as 141273358907409 + 77158778976049 = 11885847^2 + 8784007^2 .

It is a junction number, because it is equal to n+sod(n) for n = 218432137883393 and 218432137883402.

It is not an unprimeable number, because it can be changed into a prime (218432137883459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363498088 + ... + 364098508.

Almost surely, 2^{218432137883458} is an apocalyptic number.

218432137883458 is a deficient number, since it is larger than the sum of its proper divisors (110156066722742).

218432137883458 is a wasteful number, since it uses less digits than its factorization.

218432137883458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121973.

The product of its digits is 247726080, while the sum is 67.

The spelling of 218432137883458 in words is "two hundred eighteen trillion, four hundred thirty-two billion, one hundred thirty-seven million, eight hundred eighty-three thousand, four hundred fifty-eight".