5551878258 has 96 divisors (see below), whose sum is σ = 12915878976. Its totient is φ = 1717438464.

The previous prime is 5551878251. The next prime is 5551878259. The reversal of 5551878258 is 8528781555.

5551878258 is a `hidden beast` number, since 5 + 5 + 518 + 78 + 2 + 58 = 666.

It is a super-2 number, since 2×5551878258² = 61646704383306229128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5551878251) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 10615185 + ... + 10615707.

It is an arithmetic number, because the mean of its divisors is an integer number (134540406).

Almost surely, 2^5551878258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5551878258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6457939488).

5551878258 is an abundant number, since it is smaller than the sum of its proper divisors (7364000718).

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

5551878258 is a wasteful number, since it uses less digits than its factorization.

5551878258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 965 counting only the distinct ones).

The product of its digits is 4480000, while the sum is 54.

The square root of 5551878258 is about 74510.9271046871. The cubic root of 5551878258 is about 1770.7067578778.

The spelling of 5551878258 in words is "five billion, five hundred fifty-one million, eight hundred seventy-eight thousand, two hundred fifty-eight".