2991101656 has 8 divisors (see below), whose sum is σ = 5608315620. Its totient is φ = 1495550824.

The previous prime is 2991101611. The next prime is 2991101689. The reversal of 2991101656 is 6561011992.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186943846 + ... + 186943861.

Almost surely, 2^2991101656 is an apocalyptic number.

It is an amenable number.

2991101656 is a deficient number, since it is larger than the sum of its proper divisors (2617213964).

2991101656 is a wasteful number, since it uses less digits than its factorization.

2991101656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373887713 (or 373887709 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 2991101656 is about 54690.9650307983. The cubic root of 2991101656 is about 1440.8221989256.

The spelling of 2991101656 in words is "two billion, nine hundred ninety-one million, one hundred one thousand, six hundred fifty-six".