2991111077998 has 24 divisors (see below), whose sum is σ = 4825430339400. Its totient is φ = 1386696474288.

The previous prime is 2991111077993. The next prime is 2991111078073. The reversal of 2991111077998 is 8997701111992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991111077993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17732593 + ... + 17900476.

It is an arithmetic number, because the mean of its divisors is an integer number (201059597475).

Almost surely, 2^{2991111077998} is an apocalyptic number.

2991111077998 is a deficient number, since it is larger than the sum of its proper divisors (1834319261402).

2991111077998 is a wasteful number, since it uses less digits than its factorization.

2991111077998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35633184 (or 35633137 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 64.

The spelling of 2991111077998 in words is "two trillion, nine hundred ninety-one billion, one hundred eleven million, seventy-seven thousand, nine hundred ninety-eight".