65645531311236 has 24 divisors (see below), whose sum is σ = 156735067007904. Its totient is φ = 21372963682560.

The previous prime is 65645531311201. The next prime is 65645531311259. The reversal of 65645531311236 is 63211313554656.

It is a super-2 number, since 2×65645531311236² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63610010445 + ... + 63610011476.

It is an arithmetic number, because the mean of its divisors is an integer number (6530627791996).

Almost surely, 2^{65645531311236} is an apocalyptic number.

It is an amenable number.

65645531311236 is an abundant number, since it is smaller than the sum of its proper divisors (91089535696668).

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

65645531311236 is a wasteful number, since it uses less digits than its factorization.

65645531311236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127220021971 (or 127220021969 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 51.

The spelling of 65645531311236 in words is "sixty-five trillion, six hundred forty-five billion, five hundred thirty-one million, three hundred eleven thousand, two hundred thirty-six".