65189451870 has 96 divisors (see below), whose sum is σ = 172330078752. Its totient is φ = 17094260736.

The previous prime is 65189451853. The next prime is 65189451883. The reversal of 65189451870 is 7815498156.

It is a happy number.

65189451870 is a `hidden beast` number, since 6 + 5 + 189 + 451 + 8 + 7 + 0 = 666.

65189451870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65189451870² (a number of 22 digits) contains 22 as substring.

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, 2199369 + ... + 2228811.

It is an arithmetic number, because the mean of its divisors is an integer number (1795104987).

Almost surely, 2^65189451870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65189451870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86165039376).

65189451870 is an abundant number, since it is smaller than the sum of its proper divisors (107140626882).

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

65189451870 is a wasteful number, since it uses less digits than its factorization.

65189451870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29866 (or 29863 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 65189451870 in words is "sixty-five billion, one hundred eighty-nine million, four hundred fifty-one thousand, eight hundred seventy".