1656331746 has 8 divisors (see below), whose sum is σ = 3312663504. Its totient is φ = 552110580.

The previous prime is 1656331727. The next prime is 1656331753. The reversal of 1656331746 is 6471336561.

It is a sphenic number, since it is the product of 3 distinct primes.

1656331746 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1656331698 and 1656331707.

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 3 ways as a sum of consecutive naturals, for example, 138027640 + ... + 138027651.

It is an arithmetic number, because the mean of its divisors is an integer number (414082938).

Almost surely, 2^1656331746 is an apocalyptic number.

1656331746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1656331746 is a wasteful number, since it uses less digits than its factorization.

1656331746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276055296.

The product of its digits is 272160, while the sum is 42.

The square root of 1656331746 is about 40698.0558012296. The cubic root of 1656331746 is about 1183.1753377808.

The spelling of 1656331746 in words is "one billion, six hundred fifty-six million, three hundred thirty-one thousand, seven hundred forty-six".