16618113700 has 72 divisors (see below), whose sum is σ = 38461803912. Its totient is φ = 6210478080.

The previous prime is 16618113653. The next prime is 16618113719. The reversal of 16618113700 is 731181661.

It can be written as a sum of positive squares in 12 ways, for example, as 6512704 + 16611600996 = 2552^2 + 128886^2 .

It is a super-2 number, since 2×16618113700² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197224 + ... + 268576.

It is an arithmetic number, because the mean of its divisors is an integer number (534191721).

Almost surely, 2^16618113700 is an apocalyptic number.

16618113700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16618113700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19230901956).

16618113700 is an abundant number, since it is smaller than the sum of its proper divisors (21843690212).

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

16618113700 is a wasteful number, since it uses less digits than its factorization.

16618113700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71521 (or 71514 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 16618113700 in words is "sixteen billion, six hundred eighteen million, one hundred thirteen thousand, seven hundred".