55258807890 has 384 divisors, whose sum is σ = 169890545664. Its totient is φ = 11327040000.

The previous prime is 55258807889. The next prime is 55258807897. The reversal of 55258807890 is 9870885255.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 55258807890.

It is not an unprimeable number, because it can be changed into a prime (55258807897) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 48008815 + ... + 48009965.

It is an arithmetic number, because the mean of its divisors is an integer number (442423296).

Almost surely, 2^55258807890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55258807890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84945272832).

55258807890 is an abundant number, since it is smaller than the sum of its proper divisors (114631737774).

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

55258807890 is a wasteful number, since it uses less digits than its factorization.

55258807890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 57.

The spelling of 55258807890 in words is "fifty-five billion, two hundred fifty-eight million, eight hundred seven thousand, eight hundred ninety".