2620012643 has 4 divisors (see below), whose sum is σ = 2653177440. Its totient is φ = 2586847848.

The previous prime is 2620012631. The next prime is 2620012649. The reversal of 2620012643 is 3462100262.

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

It is a cyclic number.

It is not a de Polignac number, because 2620012643 - 2²⁰ = 2618964067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620012649) 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, 16582280 + ... + 16582437.

It is an arithmetic number, because the mean of its divisors is an integer number (663294360).

Almost surely, 2^2620012643 is an apocalyptic number.

2620012643 is a deficient number, since it is larger than the sum of its proper divisors (33164797).

2620012643 is an equidigital number, since it uses as much as digits as its factorization.

2620012643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33164796.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 2620012643 is about 51186.0590688519. The cubic root of 2620012643 is about 1378.5879000467.

The spelling of 2620012643 in words is "two billion, six hundred twenty million, twelve thousand, six hundred forty-three".