855087780558 has 32 divisors (see below), whose sum is σ = 1865688106752. Its totient is φ = 259111670400.

The previous prime is 855087780527. The next prime is 855087780559.

855087780558 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×855087780558³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855087780559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3483798 + ... + 3721158.

It is an arithmetic number, because the mean of its divisors is an integer number (58302753336).

Almost surely, 2^855087780558 is an apocalyptic number.

855087780558 is an abundant number, since it is smaller than the sum of its proper divisors (1010600326194).

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

855087780558 is a wasteful number, since it uses less digits than its factorization.

855087780558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291960.

The product of its (nonzero) digits is 125440000, while the sum is 66.

The spelling of 855087780558 in words is "eight hundred fifty-five billion, eighty-seven million, seven hundred eighty thousand, five hundred fifty-eight".