1672061985 has 24 divisors (see below), whose sum is σ = 3161718144. Its totient is φ = 810696480.

The previous prime is 1672061977. The next prime is 1672062001. The reversal of 1672061985 is 5891602761.

1672061985 is a `hidden beast` number, since 1 + 6 + 7 + 20 + 619 + 8 + 5 = 666.

It is not a de Polignac number, because 1672061985 - 2³ = 1672061977 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1672061985.

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 in 23 ways as a sum of consecutive naturals, for example, 1688457 + ... + 1689446.

It is an arithmetic number, because the mean of its divisors is an integer number (131738256).

Almost surely, 2^1672061985 is an apocalyptic number.

1672061985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1672061985 is a deficient number, since it is larger than the sum of its proper divisors (1489656159).

1672061985 is a wasteful number, since it uses less digits than its factorization.

1672061985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377925 (or 3377922 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1672061985 is about 40890.8545398601. The cubic root of 1672061985 is about 1186.9090948946.

The spelling of 1672061985 in words is "one billion, six hundred seventy-two million, sixty-one thousand, nine hundred eighty-five".