2511968643 has 12 divisors (see below), whose sum is σ = 3660510360. Its totient is φ = 1659825216.

The previous prime is 2511968597. The next prime is 2511968659. The reversal of 2511968643 is 3468691152.

2511968643 is a `hidden beast` number, since 2 + 511 + 96 + 8 + 6 + 43 = 666.

2511968643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2511968643 - 2⁶ = 2511968579 is a prime.

It is a super-2 number, since 2×2511968643² = 12619972926830522898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2511968243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1233973 + ... + 1236006.

It is an arithmetic number, because the mean of its divisors is an integer number (305042530).

Almost surely, 2^2511968643 is an apocalyptic number.

2511968643 is a deficient number, since it is larger than the sum of its proper divisors (1148541717).

2511968643 is a wasteful number, since it uses less digits than its factorization.

2511968643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470098 (or 2470095 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 2511968643 is about 50119.5435234600. The cubic root of 2511968643 is about 1359.3712208345.

The spelling of 2511968643 in words is "two billion, five hundred eleven million, nine hundred sixty-eight thousand, six hundred forty-three".