855798897558 has 64 divisors (see below), whose sum is σ = 1946284593408. Its totient is φ = 248557921920.

The previous prime is 855798897509. The next prime is 855798897571.

855798897558 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×855798897558² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2451685 + ... + 2778912.

It is an arithmetic number, because the mean of its divisors is an integer number (30410696772).

Almost surely, 2^855798897558 is an apocalyptic number.

855798897558 is an abundant number, since it is smaller than the sum of its proper divisors (1090485695850).

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

855798897558 is a wasteful number, since it uses less digits than its factorization.

855798897558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5230717.

The product of its digits is 10160640000, while the sum is 84.

The spelling of 855798897558 in words is "eight hundred fifty-five billion, seven hundred ninety-eight million, eight hundred ninety-seven thousand, five hundred fifty-eight".