2957681663999 has 4 divisors (see below), whose sum is σ = 2964913159920. Its totient is φ = 2950450168080.

The previous prime is 2957681663977. The next prime is 2957681664073. The reversal of 2957681663999 is 9993661867592.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2957681663999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2957686663999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3615747347 + ... + 3615748164.

It is an arithmetic number, because the mean of its divisors is an integer number (741228289980).

Almost surely, 2^{2957681663999} is an apocalyptic number.

2957681663999 is a deficient number, since it is larger than the sum of its proper divisors (7231495921).

2957681663999 is an equidigital number, since it uses as much as digits as its factorization.

2957681663999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7231495920.

The product of its digits is 2380855680, while the sum is 80.

The spelling of 2957681663999 in words is "two trillion, nine hundred fifty-seven billion, six hundred eighty-one million, six hundred sixty-three thousand, nine hundred ninety-nine".