65385532212 has 192 divisors, whose sum is σ = 206727628800. Its totient is φ = 15532715520.

The previous prime is 65385532187. The next prime is 65385532249. The reversal of 65385532212 is 21223558356.

It is a super-2 number, since 2×65385532212² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1284339 + ... + 1334277.

It is an arithmetic number, because the mean of its divisors is an integer number (1076706400).

Almost surely, 2^65385532212 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 65385532212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103363814400).

65385532212 is an abundant number, since it is smaller than the sum of its proper divisors (141342096588).

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

65385532212 is a wasteful number, since it uses less digits than its factorization.

65385532212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50086 (or 50084 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The spelling of 65385532212 in words is "sixty-five billion, three hundred eighty-five million, five hundred thirty-two thousand, two hundred twelve".