65151515999 has 4 divisors (see below), whose sum is σ = 65153411064. Its totient is φ = 65149620936.

The previous prime is 65151515981. The next prime is 65151516103. The reversal of 65151515999 is 99951515156.

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

It is a cyclic number.

It is not a de Polignac number, because 65151515999 - 2¹² = 65151511903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65151515929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894992 + ... + 965045.

It is an arithmetic number, because the mean of its divisors is an integer number (16288352766).

Almost surely, 2^65151515999 is an apocalyptic number.

65151515999 is a deficient number, since it is larger than the sum of its proper divisors (1895065).

65151515999 is a wasteful number, since it uses less digits than its factorization.

65151515999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895064.

The product of its digits is 2733750, while the sum is 56.

The spelling of 65151515999 in words is "sixty-five billion, one hundred fifty-one million, five hundred fifteen thousand, nine hundred ninety-nine".