65129916 has 36 divisors (see below), whose sum is σ = 156485672. Its totient is φ = 21068064.

The previous prime is 65129893. The next prime is 65129917. The reversal of 65129916 is 61992156.

Its product of digits (29160) is a multiple of the sum of its prime factors (810).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65129917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169861 + ... + 170243.

Almost surely, 2^65129916 is an apocalyptic number.

It is an amenable number.

65129916 is an abundant number, since it is smaller than the sum of its proper divisors (91355756).

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

65129916 is a wasteful number, since it uses less digits than its factorization.

65129916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 425 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 65129916 is about 8070.3107746852. The cubic root of 65129916 is about 402.3402727722.

The spelling of 65129916 in words is "sixty-five million, one hundred twenty-nine thousand, nine hundred sixteen".