2163970678591 has 4 divisors (see below), whose sum is σ = 2233776184384. Its totient is φ = 2094165172800.

The previous prime is 2163970678579. The next prime is 2163970678601. The reversal of 2163970678591 is 1958760793612.

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-2163970678591 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 (2163970678511) 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, 34902752850 + ... + 34902752911.

It is an arithmetic number, because the mean of its divisors is an integer number (558444046096).

Almost surely, 2^{2163970678591} is an apocalyptic number.

2163970678591 is a deficient number, since it is larger than the sum of its proper divisors (69805505793).

2163970678591 is an equidigital number, since it uses as much as digits as its factorization.

2163970678591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69805505792.

The product of its (nonzero) digits is 34292160, while the sum is 64.

The spelling of 2163970678591 in words is "two trillion, one hundred sixty-three billion, nine hundred seventy million, six hundred seventy-eight thousand, five hundred ninety-one".