2661518079212 has 24 divisors (see below), whose sum is σ = 4837108199616. Its totient is φ = 1280410982928.

The previous prime is 2661518079203. The next prime is 2661518079217. The reversal of 2661518079212 is 2129708151662.

It is not an unprimeable number, because it can be changed into a prime (2661518079217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115465658 + ... + 115488705.

It is an arithmetic number, because the mean of its divisors is an integer number (201546174984).

Almost surely, 2^{2661518079212} is an apocalyptic number.

It is an amenable number.

2661518079212 is a deficient number, since it is larger than the sum of its proper divisors (2175590120404).

2661518079212 is a wasteful number, since it uses less digits than its factorization.

2661518079212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230954477 (or 230954475 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 2661518079212 in words is "two trillion, six hundred sixty-one billion, five hundred eighteen million, seventy-nine thousand, two hundred twelve".