2661518079213 has 64 divisors (see below), whose sum is σ = 4107127664640. Its totient is φ = 1501670016000.

The previous prime is 2661518079203. The next prime is 2661518079217. The reversal of 2661518079213 is 3129708151662.

It is not a de Polignac number, because 2661518079213 - 2¹⁶ = 2661518013677 is a prime.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 950201413 + ... + 950204213.

It is an arithmetic number, because the mean of its divisors is an integer number (64173869760).

Almost surely, 2^{2661518079213} is an apocalyptic number.

It is an amenable number.

2661518079213 is a deficient number, since it is larger than the sum of its proper divisors (1445609585427).

2661518079213 is a wasteful number, since it uses less digits than its factorization.

2661518079213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 2661518079213 in words is "two trillion, six hundred sixty-one billion, five hundred eighteen million, seventy-nine thousand, two hundred thirteen".