16618381700 has 36 divisors (see below), whose sum is σ = 36080594340. Its totient is φ = 6643904640.

The previous prime is 16618381697. The next prime is 16618381723. The reversal of 16618381700 is 718381661.

It can be written as a sum of positive squares in 6 ways, for example, as 4639516996 + 11978864704 = 68114^2 + 109448^2 .

It is a super-2 number, since 2×16618381700² (a number of 21 digits) contains 22 as substring.

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, 155186 + ... + 239414.

Almost surely, 2^16618381700 is an apocalyptic number.

16618381700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16618381700 is an abundant number, since it is smaller than the sum of its proper divisors (19462212640).

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

16618381700 is a wasteful number, since it uses less digits than its factorization.

16618381700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86216 (or 86209 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 16618381700 in words is "sixteen billion, six hundred eighteen million, three hundred eighty-one thousand, seven hundred".