55139648 has 56 divisors (see below), whose sum is σ = 116750592. Its totient is φ = 25777664.

The previous prime is 55139641. The next prime is 55139677. The reversal of 55139648 is 84693155.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55139641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68786 + ... + 69582.

It is an arithmetic number, because the mean of its divisors is an integer number (2084832).

Almost surely, 2^55139648 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 55139648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58375296).

55139648 is an abundant number, since it is smaller than the sum of its proper divisors (61610944).

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

55139648 is a wasteful number, since it uses less digits than its factorization.

55139648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 869 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 55139648 is about 7425.6075845684. The cubic root of 55139648 is about 380.6168375078.

The spelling of 55139648 in words is "fifty-five million, one hundred thirty-nine thousand, six hundred forty-eight".