65415516 has 12 divisors (see below), whose sum is σ = 152636232. Its totient is φ = 21805168.

The previous prime is 65415509. The next prime is 65415521. The reversal of 65415516 is 61551456.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2725635 + ... + 2725658.

It is an arithmetic number, because the mean of its divisors is an integer number (12719686).

Almost surely, 2^65415516 is an apocalyptic number.

It is an amenable number.

65415516 is an abundant number, since it is smaller than the sum of its proper divisors (87220716).

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

65415516 is a wasteful number, since it uses less digits than its factorization.

65415516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5451300 (or 5451298 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 65415516 is about 8087.9859050322. The cubic root of 65415516 is about 402.9275135572.

The spelling of 65415516 in words is "sixty-five million, four hundred fifteen thousand, five hundred sixteen".