65198279892 has 48 divisors (see below), whose sum is σ = 157567536000. Its totient is φ = 20957704320.

The previous prime is 65198279891. The next prime is 65198279893. The reversal of 65198279892 is 29897289156.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65198279891) and next prime (65198279893).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65198279891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171609 + ... + 399807.

It is an arithmetic number, because the mean of its divisors is an integer number (3282657000).

Almost surely, 2^65198279892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65198279892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78783768000).

65198279892 is an abundant number, since it is smaller than the sum of its proper divisors (92369256108).

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

65198279892 is a wasteful number, since it uses less digits than its factorization.

65198279892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229056 (or 229054 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 66.

The spelling of 65198279892 in words is "sixty-five billion, one hundred ninety-eight million, two hundred seventy-nine thousand, eight hundred ninety-two".