1982169544 has 8 divisors (see below), whose sum is σ = 3716567910. Its totient is φ = 991084768.

The previous prime is 1982169533. The next prime is 1982169557. The reversal of 1982169544 is 4459612891.

It can be written as a sum of positive squares in only one way, i.e., 1910564100 + 71605444 = 43710^2 + 8462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1982169544² = 7857992202322335872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123885589 + ... + 123885604.

Almost surely, 2^1982169544 is an apocalyptic number.

It is an amenable number.

1982169544 is a deficient number, since it is larger than the sum of its proper divisors (1734398366).

1982169544 is a wasteful number, since it uses less digits than its factorization.

1982169544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247771199 (or 247771195 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 1982169544 is about 44521.5626859615. The cubic root of 1982169544 is about 1256.1657066318.

The spelling of 1982169544 in words is "one billion, nine hundred eighty-two million, one hundred sixty-nine thousand, five hundred forty-four".