1656338816 has 32 divisors (see below), whose sum is σ = 3599716680. Its totient is φ = 752880640.

The previous prime is 1656338809. The next prime is 1656338819. The reversal of 1656338816 is 6188336561.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656338819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586781 + ... + 589596.

Almost surely, 2^1656338816 is an apocalyptic number.

1656338816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1656338816 is an abundant number, since it is smaller than the sum of its proper divisors (1943377864).

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

1656338816 is a wasteful number, since it uses less digits than its factorization.

1656338816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176402 (or 1176390 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The square root of 1656338816 is about 40698.1426603230. The cubic root of 1656338816 is about 1183.1770212273.

The spelling of 1656338816 in words is "one billion, six hundred fifty-six million, three hundred thirty-eight thousand, eight hundred sixteen".