1656265755648 has 704 divisors, whose sum is σ = 5291675136000. Its totient is φ = 460254412800.

The previous prime is 1656265755623. The next prime is 1656265755713. The reversal of 1656265755648 is 8465575626561.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8407440286 + ... + 8407440482.

It is an arithmetic number, because the mean of its divisors is an integer number (7516584000).

Almost surely, 2^{1656265755648} 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 1656265755648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2645837568000).

1656265755648 is an abundant number, since it is smaller than the sum of its proper divisors (3635409380352).

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

1656265755648 is a wasteful number, since it uses less digits than its factorization.

1656265755648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 389 counting only the distinct ones).

The product of its digits is 362880000, while the sum is 66.

The spelling of 1656265755648 in words is "one trillion, six hundred fifty-six billion, two hundred sixty-five million, seven hundred fifty-five thousand, six hundred forty-eight".