201611691008 has 352 divisors, whose sum is σ = 544951357440. Its totient is φ = 72260812800.

The previous prime is 201611690971. The next prime is 201611691019. The reversal of 201611691008 is 800196116102.

It is a super-2 number, since 2×201611691008² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40718933 + ... + 40723883.

Almost surely, 2^201611691008 is an apocalyptic number.

201611691008 is a gapful number since it is divisible by the number (28) 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 201611691008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272475678720).

201611691008 is an abundant number, since it is smaller than the sum of its proper divisors (343339666432).

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

201611691008 is a wasteful number, since it uses less digits than its factorization.

201611691008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033 (or 5015 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 201611691008 in words is "two hundred one billion, six hundred eleven million, six hundred ninety-one thousand, eight".