55530832578 has 16 divisors (see below), whose sum is σ = 119604870336. Its totient is φ = 17086410000.

The previous prime is 55530832531. The next prime is 55530832579. The reversal of 55530832578 is 87523803555.

55530832578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55530832578² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55530832578.

It is not an unprimeable number, because it can be changed into a prime (55530832579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355966798 + ... + 355966953.

It is an arithmetic number, because the mean of its divisors is an integer number (7475304396).

Almost surely, 2^55530832578 is an apocalyptic number.

55530832578 is an abundant number, since it is smaller than the sum of its proper divisors (64074037758).

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

55530832578 is a wasteful number, since it uses less digits than its factorization.

55530832578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711933769.

The product of its (nonzero) digits is 5040000, while the sum is 51.

The spelling of 55530832578 in words is "fifty-five billion, five hundred thirty million, eight hundred thirty-two thousand, five hundred seventy-eight".