656494080 has 320 divisors, whose sum is σ = 2415916800. Its totient is φ = 150405120.

The previous prime is 656494079. The next prime is 656494103. The reversal of 656494080 is 80494656.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1604916 + ... + 1605324.

It is an arithmetic number, because the mean of its divisors is an integer number (7549740).

Almost surely, 2^656494080 is an apocalyptic number.

656494080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656494080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1207958400).

656494080 is an abundant number, since it is smaller than the sum of its proper divisors (1759422720).

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

656494080 is a wasteful number, since it uses less digits than its factorization.

656494080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 656494080 is about 25622.1404258114. The cubic root of 656494080 is about 869.1143848304.

The spelling of 656494080 in words is "six hundred fifty-six million, four hundred ninety-four thousand, eighty".