653881608 has 96 divisors (see below), whose sum is σ = 1880236800. Its totient is φ = 204578304.

The previous prime is 653881597. The next prime is 653881633. The reversal of 653881608 is 806188356.

653881608 is a `hidden beast` number, since 6 + 5 + 38 + 8 + 1 + 608 = 666.

It is a super-2 number, since 2×653881608² = 855122314561331328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 879685 + ... + 880427.

It is an arithmetic number, because the mean of its divisors is an integer number (19585800).

Almost surely, 2^653881608 is an apocalyptic number.

653881608 is a gapful number since it is divisible by the number (68) 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 653881608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940118400).

653881608 is an abundant number, since it is smaller than the sum of its proper divisors (1226355192).

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

653881608 is a wasteful number, since it uses less digits than its factorization.

653881608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 653881608 is about 25571.1088535480. The cubic root of 653881608 is about 867.9599923514.

The spelling of 653881608 in words is "six hundred fifty-three million, eight hundred eighty-one thousand, six hundred eight".