2991201858 has 30 divisors (see below), whose sum is σ = 6704068041. Its totient is φ = 996835248.

The previous prime is 2991201817. The next prime is 2991201877. The reversal of 2991201858 is 8581021992.

It can be written as a sum of positive squares in 2 ways, for example, as 2987387649 + 3814209 = 54657^2 + 1953^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=38673.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 693966 + ... + 698262.

Almost surely, 2^2991201858 is an apocalyptic number.

2991201858 is an abundant number, since it is smaller than the sum of its proper divisors (3712866183).

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

2991201858 is an frugal number, since it uses more digits than its factorization.

2991201858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8608 (or 4302 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 2991201858 is about 54691.8810976547. The cubic root of 2991201858 is about 1440.8382879423.

The spelling of 2991201858 in words is "two billion, nine hundred ninety-one million, two hundred one thousand, eight hundred fifty-eight".