65216992900 has 72 divisors (see below), whose sum is σ = 152673118920. Its totient is φ = 24088995840.

The previous prime is 65216992843. The next prime is 65216992903. The reversal of 65216992900 is 929961256.

It can be written as a sum of positive squares in 12 ways, for example, as 3502509124 + 61714483776 = 59182^2 + 248424^2 .

It is not an unprimeable number, because it can be changed into a prime (65216992903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271815 + ... + 452014.

It is an arithmetic number, because the mean of its divisors is an integer number (2120459985).

Almost surely, 2^65216992900 is an apocalyptic number.

It is an amenable number.

65216992900 is an abundant number, since it is smaller than the sum of its proper divisors (87456126020).

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

65216992900 is a wasteful number, since it uses less digits than its factorization.

65216992900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723913 (or 723906 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 65216992900 in words is "sixty-five billion, two hundred sixteen million, nine hundred ninety-two thousand, nine hundred".