65198172 has 48 divisors (see below), whose sum is σ = 164867360. Its totient is φ = 20052864.

The previous prime is 65198167. The next prime is 65198183. The reversal of 65198172 is 27189156.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 65198172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25128 + ... + 27600.

Almost surely, 2^65198172 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 65198172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82433680).

65198172 is an abundant number, since it is smaller than the sum of its proper divisors (99669188).

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

65198172 is a wasteful number, since it uses less digits than its factorization.

65198172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519 (or 2491 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 65198172 is about 8074.5385007442. The cubic root of 65198172 is about 402.4807742575.

The spelling of 65198172 in words is "sixty-five million, one hundred ninety-eight thousand, one hundred seventy-two".