1656326464 has 56 divisors (see below), whose sum is σ = 3544620800. Its totient is φ = 763375104.

The previous prime is 1656326461. The next prime is 1656326491. The reversal of 1656326464 is 4646236561.

It is a self number, because there is not a number n which added to its sum of digits gives 1656326464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656326461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163257 + ... + 1164679.

It is an arithmetic number, because the mean of its divisors is an integer number (63296800).

Almost surely, 2^1656326464 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 1656326464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772310400).

1656326464 is an abundant number, since it is smaller than the sum of its proper divisors (1888294336).

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

1656326464 is a wasteful number, since it uses less digits than its factorization.

1656326464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847 (or 2837 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The square root of 1656326464 is about 40697.9909086431. The cubic root of 1656326464 is about 1183.1740800741.

The spelling of 1656326464 in words is "one billion, six hundred fifty-six million, three hundred twenty-six thousand, four hundred sixty-four".