1981602162 has 12 divisors (see below), whose sum is σ = 4293471390. Its totient is φ = 660534048.

The previous prime is 1981602157. The next prime is 1981602179. The reversal of 1981602162 is 2612061891.

It can be written as a sum of positive squares in only one way, i.e., 1762236441 + 219365721 = 41979^2 + 14811^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55044487 + ... + 55044522.

Almost surely, 2^1981602162 is an apocalyptic number.

1981602162 is an abundant number, since it is smaller than the sum of its proper divisors (2311869228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1981602162 is a wasteful number, since it uses less digits than its factorization.

1981602162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110089017 (or 110089014 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1981602162 is about 44515.1902388387. The cubic root of 1981602162 is about 1256.0458390136.

The spelling of 1981602162 in words is "one billion, nine hundred eighty-one million, six hundred two thousand, one hundred sixty-two".