65506651172 has 24 divisors (see below), whose sum is σ = 115048636416. Its totient is φ = 32635825568.

The previous prime is 65506651169. The next prime is 65506651193. The reversal of 65506651172 is 27115660556.

It is a super-2 number, since 2×65506651172² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228253 + ... + 1280475.

It is an arithmetic number, because the mean of its divisors is an integer number (4793693184).

Almost surely, 2^65506651172 is an apocalyptic number.

It is an amenable number.

65506651172 is a deficient number, since it is larger than the sum of its proper divisors (49541985244).

65506651172 is a wasteful number, since it uses less digits than its factorization.

65506651172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53347 (or 53345 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 65506651172 in words is "sixty-five billion, five hundred six million, six hundred fifty-one thousand, one hundred seventy-two".