1643683148 has 12 divisors (see below), whose sum is σ = 3045648312. Its totient is φ = 773497920.

The previous prime is 1643683123. The next prime is 1643683177. The reversal of 1643683148 is 8413863461.

It is a junction number, because it is equal to n+sod(n) for n = 1643683099 and 1643683108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12085838 + ... + 12085973.

It is an arithmetic number, because the mean of its divisors is an integer number (253804026).

Almost surely, 2^1643683148 is an apocalyptic number.

It is an amenable number.

1643683148 is a deficient number, since it is larger than the sum of its proper divisors (1401965164).

1643683148 is a wasteful number, since it uses less digits than its factorization.

1643683148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24171832 (or 24171830 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 1643683148 is about 40542.3623880010. The cubic root of 1643683148 is about 1180.1558608638.

The spelling of 1643683148 in words is "one billion, six hundred forty-three million, six hundred eighty-three thousand, one hundred forty-eight".