139553568 has 432 divisors, whose sum is σ = 537788160. Its totient is φ = 33868800.

The previous prime is 139553551. The next prime is 139553593. The reversal of 139553568 is 865355931.

139553568 is a `hidden beast` number, since 1 + 39 + 5 + 53 + 568 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4501713 + ... + 4501743.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^139553568 is an apocalyptic number.

139553568 is a gapful number since it is divisible by the number (18) 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 139553568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268894080).

139553568 is an abundant number, since it is smaller than the sum of its proper divisors (398234592).

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

139553568 is a wasteful number, since it uses less digits than its factorization.

139553568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 83 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 139553568 is about 11813.2793076267. The cubic root of 139553568 is about 518.6968949750.

The spelling of 139553568 in words is "one hundred thirty-nine million, five hundred fifty-three thousand, five hundred sixty-eight".