55233937878 has 144 divisors (see below), whose sum is σ = 137499882480. Its totient is φ = 14743669248.

The previous prime is 55233937867. The next prime is 55233937937. The reversal of 55233937878 is 87873933255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7744218 + ... + 7751346.

It is an arithmetic number, because the mean of its divisors is an integer number (954860295).

Almost surely, 2^55233937878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55233937878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68749941240).

55233937878 is an abundant number, since it is smaller than the sum of its proper divisors (82265944602).

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

55233937878 is a wasteful number, since it uses less digits than its factorization.

55233937878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259 (or 7233 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 60.

The spelling of 55233937878 in words is "fifty-five billion, two hundred thirty-three million, nine hundred thirty-seven thousand, eight hundred seventy-eight".