73661317613 has 8 divisors (see below), whose sum is σ = 79419933600. Its totient is φ = 67915896048.

The previous prime is 73661317601. The next prime is 73661317627. The reversal of 73661317613 is 31671316637.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73661317613 - 2²⁰ = 73660269037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73661314613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3287003 + ... + 3309336.

It is an arithmetic number, because the mean of its divisors is an integer number (9927491700).

Almost surely, 2^73661317613 is an apocalyptic number.

It is an amenable number.

73661317613 is a deficient number, since it is larger than the sum of its proper divisors (5758615987).

73661317613 is a wasteful number, since it uses less digits than its factorization.

73661317613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597211.

The product of its digits is 285768, while the sum is 44.

The spelling of 73661317613 in words is "seventy-three billion, six hundred sixty-one million, three hundred seventeen thousand, six hundred thirteen".