65520073747220 has 48 divisors (see below), whose sum is σ = 138177489945600. Its totient is φ = 26096552401920.

The previous prime is 65520073747181. The next prime is 65520073747231. The reversal of 65520073747220 is 2274737002556.

65520073747220 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 2×65520073747220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69130901 + ... + 70072259.

It is an arithmetic number, because the mean of its divisors is an integer number (2878697707200).

Almost surely, 2^{65520073747220} is an apocalyptic number.

It is an amenable number.

65520073747220 is an abundant number, since it is smaller than the sum of its proper divisors (72657416198380).

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

65520073747220 is a wasteful number, since it uses less digits than its factorization.

65520073747220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956168 (or 956166 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 50.

The spelling of 65520073747220 in words is "sixty-five trillion, five hundred twenty billion, seventy-three million, seven hundred forty-seven thousand, two hundred twenty".