218159112550 has 48 divisors (see below), whose sum is σ = 407525291712. Its totient is φ = 86887987200.

The previous prime is 218159112517. The next prime is 218159112557. The reversal of 218159112550 is 55211951812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218159112557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18028102 + ... + 18040198.

It is an arithmetic number, because the mean of its divisors is an integer number (8490110244).

Almost surely, 2^218159112550 is an apocalyptic number.

218159112550 is a deficient number, since it is larger than the sum of its proper divisors (189366179162).

218159112550 is a wasteful number, since it uses less digits than its factorization.

218159112550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13633 (or 13628 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 40.

The spelling of 218159112550 in words is "two hundred eighteen billion, one hundred fifty-nine million, one hundred twelve thousand, five hundred fifty".