65061515 has 4 divisors (see below), whose sum is σ = 78073824. Its totient is φ = 52049208.

The previous prime is 65061509. The next prime is 65061527. The reversal of 65061515 is 51516056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65061515 is a prime.

It is a Duffinian 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, 6506147 + ... + 6506156.

It is an arithmetic number, because the mean of its divisors is an integer number (19518456).

Almost surely, 2^65061515 is an apocalyptic number.

65061515 is a deficient number, since it is larger than the sum of its proper divisors (13012309).

65061515 is a wasteful number, since it uses less digits than its factorization.

65061515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13012308.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 65061515 is about 8066.0718444606. The cubic root of 65061515 is about 402.1993743006.

The spelling of 65061515 in words is "sixty-five million, sixty-one thousand, five hundred fifteen".