65509149696 has 176 divisors, whose sum is σ = 184171046400. Its totient is φ = 20644872192.

The previous prime is 65509149691. The next prime is 65509149703. The reversal of 65509149696 is 69694190556.

It is not an unprimeable number, because it can be changed into a prime (65509149691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41382121 + ... + 41383703.

It is an arithmetic number, because the mean of its divisors is an integer number (1046426400).

Almost surely, 2^65509149696 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 65509149696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92085523200).

65509149696 is an abundant number, since it is smaller than the sum of its proper divisors (118661896704).

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

65509149696 is a wasteful number, since it uses less digits than its factorization.

65509149696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2316 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 60.

The spelling of 65509149696 in words is "sixty-five billion, five hundred nine million, one hundred forty-nine thousand, six hundred ninety-six".