2691312880786 has 8 divisors (see below), whose sum is σ = 4076939314764. Its totient is φ = 1332333109200.

The previous prime is 2691312880733. The next prime is 2691312880787. The reversal of 2691312880786 is 6870882131962.

It can be written as a sum of positive squares in 2 ways, for example, as 2432149416225 + 259163464561 = 1559535^2 + 509081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2691312880787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6661665345 + ... + 6661665748.

Almost surely, 2^{2691312880786} is an apocalyptic number.

2691312880786 is a deficient number, since it is larger than the sum of its proper divisors (1385626433978).

2691312880786 is a wasteful number, since it uses less digits than its factorization.

2691312880786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13323331196.

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 2691312880786 in words is "two trillion, six hundred ninety-one billion, three hundred twelve million, eight hundred eighty thousand, seven hundred eighty-six".