655791215898 has 96 divisors (see below), whose sum is σ = 1653548287104. Its totient is φ = 171854137728.

The previous prime is 655791215867. The next prime is 655791215941. The reversal of 655791215898 is 898512197556.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53611 + ... + 1146497.

It is an arithmetic number, because the mean of its divisors is an integer number (17224461324).

Almost surely, 2^655791215898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655791215898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826774143552).

655791215898 is an abundant number, since it is smaller than the sum of its proper divisors (997757071206).

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

655791215898 is a wasteful number, since it uses less digits than its factorization.

655791215898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093076 (or 1093069 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 66.

The spelling of 655791215898 in words is "six hundred fifty-five billion, seven hundred ninety-one million, two hundred fifteen thousand, eight hundred ninety-eight".