2646423847391 has 32 divisors (see below), whose sum is σ = 2873826210816. Its totient is φ = 2427264000000.

The previous prime is 2646423847363. The next prime is 2646423847393. The reversal of 2646423847391 is 1937483246462.

2646423847391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2646423847391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2646423847391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646423847393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 878917076 + ... + 878920086.

It is an arithmetic number, because the mean of its divisors is an integer number (89807069088).

Almost surely, 2^{2646423847391} is an apocalyptic number.

2646423847391 is a deficient number, since it is larger than the sum of its proper divisors (227402363425).

2646423847391 is a wasteful number, since it uses less digits than its factorization.

2646423847391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423.

The product of its digits is 41803776, while the sum is 59.

The spelling of 2646423847391 in words is "two trillion, six hundred forty-six billion, four hundred twenty-three million, eight hundred forty-seven thousand, three hundred ninety-one".