65561614516220 has 48 divisors (see below), whose sum is σ = 138401584936608. Its totient is φ = 26087102300160.

The previous prime is 65561614516201. The next prime is 65561614516247. The reversal of 65561614516220 is 2261541616556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60867140 + ... + 61934900.

It is an arithmetic number, because the mean of its divisors is an integer number (2883366352846).

Almost surely, 2^{65561614516220} is an apocalyptic number.

It is an amenable number.

65561614516220 is an abundant number, since it is smaller than the sum of its proper divisors (72839970420388).

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

65561614516220 is a wasteful number, since it uses less digits than its factorization.

65561614516220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083870 (or 1083868 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 65561614516220 in words is "sixty-five trillion, five hundred sixty-one billion, six hundred fourteen million, five hundred sixteen thousand, two hundred twenty".