65696169652640 has 48 divisors (see below), whose sum is σ = 155216340824328. Its totient is φ = 26276920344576.

The previous prime is 65696169652639. The next prime is 65696169652679. The reversal of 65696169652640 is 4625696169656.

It can be written as a sum of positive squares in 4 ways, for example, as 34651258987024 + 31044910665616 = 5886532^2 + 5571796^2 .

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, 9362597 + ... + 14800356.

Almost surely, 2^{65696169652640} is an apocalyptic number.

It is an amenable number.

65696169652640 is an abundant number, since it is smaller than the sum of its proper divisors (89520171171688).

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

65696169652640 is a wasteful number, since it uses less digits than its factorization.

65696169652640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24179961 (or 24179953 counting only the distinct ones).

The product of its (nonzero) digits is 755827200, while the sum is 71.

The spelling of 65696169652640 in words is "sixty-five trillion, six hundred ninety-six billion, one hundred sixty-nine million, six hundred fifty-two thousand, six hundred forty".