65609407608531 has 16 divisors (see below), whose sum is σ = 92741690969088. Its totient is φ = 41184632498400.

The previous prime is 65609407608467. The next prime is 65609407608551. The reversal of 65609407608531 is 13580670490656.

It is not a de Polignac number, because 65609407608531 - 2⁶ = 65609407608467 is a prime.

It is a super-2 number, since 2×65609407608531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65609407608551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9533476305 + ... + 9533483186.

It is an arithmetic number, because the mean of its divisors is an integer number (5796355685568).

Almost surely, 2^{65609407608531} is an apocalyptic number.

65609407608531 is a deficient number, since it is larger than the sum of its proper divisors (27132283360557).

65609407608531 is a wasteful number, since it uses less digits than its factorization.

65609407608531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19066959562.

The product of its (nonzero) digits is 32659200, while the sum is 60.

The spelling of 65609407608531 in words is "sixty-five trillion, six hundred nine billion, four hundred seven million, six hundred eight thousand, five hundred thirty-one".