2691531729649 has 8 divisors (see below), whose sum is σ = 3080132188928. Its totient is φ = 2303955252000.

The previous prime is 2691531729647. The next prime is 2691531729659. The reversal of 2691531729649 is 9469271351962.

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

It is a cyclic number.

It is not a de Polignac number, because 2691531729649 - 2¹ = 2691531729647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2691531729641) 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, 255989772 + ... + 256000285.

It is an arithmetic number, because the mean of its divisors is an integer number (385016523616).

Almost surely, 2^{2691531729649} is an apocalyptic number.

It is an amenable number.

2691531729649 is a deficient number, since it is larger than the sum of its proper divisors (388600459279).

2691531729649 is an equidigital number, since it uses as much as digits as its factorization.

2691531729649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511990815.

The product of its digits is 44089920, while the sum is 64.

The spelling of 2691531729649 in words is "two trillion, six hundred ninety-one billion, five hundred thirty-one million, seven hundred twenty-nine thousand, six hundred forty-nine".