1979983556 has 12 divisors (see below), whose sum is σ = 3465325500. Its totient is φ = 989890560.

The previous prime is 1979983541. The next prime is 1979983637. The reversal of 1979983556 is 6553899791.

It can be written as a sum of positive squares in 2 ways, for example, as 937339456 + 1042644100 = 30616^2 + 32290^2 .

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, 34316 + ... + 71676.

It is an arithmetic number, because the mean of its divisors is an integer number (288777125).

Almost surely, 2^1979983556 is an apocalyptic number.

It is an amenable number.

1979983556 is a deficient number, since it is larger than the sum of its proper divisors (1485341944).

1979983556 is a wasteful number, since it uses less digits than its factorization.

1979983556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50614 (or 50612 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 62.

The square root of 1979983556 is about 44497.0061464814. The cubic root of 1979983556 is about 1255.7037593969.

The spelling of 1979983556 in words is "one billion, nine hundred seventy-nine million, nine hundred eighty-three thousand, five hundred fifty-six".