65651500000 has 84 divisors (see below), whose sum is σ = 161563400712. Its totient is φ = 26260400000.

The previous prime is 65651499959. The next prime is 65651500001. The reversal of 65651500000 is 515656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65651500001) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 434349 + ... + 565651.

It is an arithmetic number, because the mean of its divisors is an integer number (1923373818).

Almost surely, 2^65651500000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65651500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80781700356).

65651500000 is an abundant number, since it is smaller than the sum of its proper divisors (95911900712).

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

65651500000 is an frugal number, since it uses more digits than its factorization.

65651500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131343 (or 131310 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 65651500000 in words is "sixty-five billion, six hundred fifty-one million, five hundred thousand".