2612381643 has 12 divisors (see below), whose sum is σ = 3774858360. Its totient is φ = 1740933216.

The previous prime is 2612381627. The next prime is 2612381647. The reversal of 2612381643 is 3461832162.

2612381643 is a `hidden beast` number, since 2 + 6 + 1 + 2 + 3 + 8 + 1 + 643 = 666.

It is not a de Polignac number, because 2612381643 - 2⁴ = 2612381627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2612381598 and 2612381607.

It is not an unprimeable number, because it can be changed into a prime (2612381647) 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, 28621 + ... + 77742.

It is an arithmetic number, because the mean of its divisors is an integer number (314571530).

Almost surely, 2^2612381643 is an apocalyptic number.

2612381643 is a deficient number, since it is larger than the sum of its proper divisors (1162476717).

2612381643 is a wasteful number, since it uses less digits than its factorization.

2612381643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109098 (or 109095 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2612381643 is about 51111.4629315186. The cubic root of 2612381643 is about 1377.2481820485.

The spelling of 2612381643 in words is "two billion, six hundred twelve million, three hundred eighty-one thousand, six hundred forty-three".