655099998 has 96 divisors (see below), whose sum is σ = 1642887168. Its totient is φ = 170380800.

The previous prime is 655099979. The next prime is 655100021. The reversal of 655099998 is 899990556.

It is a Curzon number.

It is a congruent number.

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, 375408 + ... + 377148.

It is an arithmetic number, because the mean of its divisors is an integer number (17113408).

Almost surely, 2^655099998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655099998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821443584).

655099998 is an abundant number, since it is smaller than the sum of its proper divisors (987787170).

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

655099998 is a wasteful number, since it uses less digits than its factorization.

655099998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 7873200, while the sum is 60.

The square root of 655099998 is about 25594.9213321706. The cubic root of 655099998 is about 868.4987532997.

The spelling of 655099998 in words is "six hundred fifty-five million, ninety-nine thousand, nine hundred ninety-eight".