2991101688 has 64 divisors (see below), whose sum is σ = 8314596000. Its totient is φ = 996316416.

The previous prime is 2991101611. The next prime is 2991101689. The reversal of 2991101688 is 8861011992.

It is a super-5 number, since 5×2991101688⁵ (a number of 49 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991101689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356356 + ... + 364652.

Almost surely, 2^2991101688 is an apocalyptic number.

It is an amenable number.

2991101688 is an abundant number, since it is smaller than the sum of its proper divisors (5323494312).

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

2991101688 is a wasteful number, since it uses less digits than its factorization.

2991101688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9981 (or 9971 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 2991101688 is about 54690.9653233512. The cubic root of 2991101688 is about 1440.8222040638.

The spelling of 2991101688 in words is "two billion, nine hundred ninety-one million, one hundred one thousand, six hundred eighty-eight".