65220506000 has 80 divisors (see below), whose sum is σ = 169834265328. Its totient is φ = 24081408000.

The previous prime is 65220505993. The next prime is 65220506011. The reversal of 65220506000 is 60502256.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 52042384384 + 13178121616 = 228128^2 + 114796^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 1228241 + ... + 1280240.

Almost surely, 2^65220506000 is an apocalyptic number.

It is an amenable number.

65220506000 is an abundant number, since it is smaller than the sum of its proper divisors (104613759328).

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

65220506000 is a wasteful number, since it uses less digits than its factorization.

65220506000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508517 (or 2508501 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 65220506000 in words is "sixty-five billion, two hundred twenty million, five hundred six thousand".