1656908672 has 96 divisors (see below), whose sum is σ = 3584826720. Its totient is φ = 762331136.

The previous prime is 1656908653. The next prime is 1656908767. The reversal of 1656908672 is 2768096561.

It is a self number, because there is not a number n which added to its sum of digits gives 1656908672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1738148 + ... + 1739100.

It is an arithmetic number, because the mean of its divisors is an integer number (37341945).

Almost surely, 2^1656908672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656908672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792413360).

1656908672 is an abundant number, since it is smaller than the sum of its proper divisors (1927918048).

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

1656908672 is an equidigital number, since it uses as much as digits as its factorization.

1656908672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 1656908672 is about 40705.1430657110. The cubic root of 1656908672 is about 1183.3126945992.

The spelling of 1656908672 in words is "one billion, six hundred fifty-six million, nine hundred eight thousand, six hundred seventy-two".