1646368956 has 48 divisors (see below), whose sum is σ = 4406062080. Its totient is φ = 531085680.

The previous prime is 1646368939. The next prime is 1646368963. The reversal of 1646368956 is 6598636461.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 242526 + ... + 249221.

It is an arithmetic number, because the mean of its divisors is an integer number (91792960).

Almost surely, 2^1646368956 is an apocalyptic number.

It is an amenable number.

1646368956 is an abundant number, since it is smaller than the sum of its proper divisors (2759693124).

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

1646368956 is a wasteful number, since it uses less digits than its factorization.

1646368956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491791 (or 491783 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 1646368956 is about 40575.4723447553. The cubic root of 1646368956 is about 1180.7983097421.

The spelling of 1646368956 in words is "one billion, six hundred forty-six million, three hundred sixty-eight thousand, nine hundred fifty-six".