1656620046 has 128 divisors (see below), whose sum is σ = 4031078400. Its totient is φ = 502295040.

The previous prime is 1656620039. The next prime is 1656620059. The reversal of 1656620046 is 6400266561.

It is a happy number.

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 63 ways as a sum of consecutive naturals, for example, 3843451 + ... + 3843881.

It is an arithmetic number, because the mean of its divisors is an integer number (31492800).

Almost surely, 2^1656620046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656620046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2015539200).

1656620046 is an abundant number, since it is smaller than the sum of its proper divisors (2374458354).

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

1656620046 is a wasteful number, since it uses less digits than its factorization.

1656620046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1656620046 is about 40701.5975853528. The cubic root of 1656620046 is about 1183.2439813686.

The spelling of 1656620046 in words is "one billion, six hundred fifty-six million, six hundred twenty thousand, forty-six".