16518916998 has 24 divisors (see below), whose sum is σ = 36377726736. Its totient is φ = 5416038000.

The previous prime is 16518916979. The next prime is 16518917011. The reversal of 16518916998 is 89961981561.

16518916998 is a `hidden beast` number, since 16 + 518 + 9 + 16 + 9 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7521178 + ... + 7523373.

It is an arithmetic number, because the mean of its divisors is an integer number (1515738614).

Almost surely, 2^16518916998 is an apocalyptic number.

16518916998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16518916998 is an abundant number, since it is smaller than the sum of its proper divisors (19858809738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16518916998 is a wasteful number, since it uses less digits than its factorization.

16518916998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15044620 (or 15044617 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 63.

The spelling of 16518916998 in words is "sixteen billion, five hundred eighteen million, nine hundred sixteen thousand, nine hundred ninety-eight".