65961161600 has 48 divisors (see below), whose sum is σ = 162944689920. Its totient is φ = 26384463360.

The previous prime is 65961161569. The next prime is 65961161647. The reversal of 65961161600 is 616116956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10303232 + ... + 10309631.

It is an arithmetic number, because the mean of its divisors is an integer number (3394681040).

Almost surely, 2^65961161600 is an apocalyptic number.

It is an amenable number.

65961161600 is an abundant number, since it is smaller than the sum of its proper divisors (96983528320).

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

65961161600 is a wasteful number, since it uses less digits than its factorization.

65961161600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20612887 (or 20612870 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 65961161600 in words is "sixty-five billion, nine hundred sixty-one million, one hundred sixty-one thousand, six hundred".