73217992657781 has 8 divisors (see below), whose sum is σ = 73509970623264. Its totient is φ = 72926016858000.

The previous prime is 73217992657751. The next prime is 73217992657787. The reversal of 73217992657781 is 18775629971237.

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

It is a cyclic number.

It is not a de Polignac number, because 73217992657781 - 2²⁶ = 73217925548917 is a prime.

It is a super-2 number, since 2×73217992657781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73217992657699 and 73217992657708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73217992657787) 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 7 ways as a sum of consecutive naturals, for example, 126525806 + ... + 127103168.

It is an arithmetic number, because the mean of its divisors is an integer number (9188746327908).

Almost surely, 2^{73217992657781} is an apocalyptic number.

It is an amenable number.

73217992657781 is a deficient number, since it is larger than the sum of its proper divisors (291977965483).

73217992657781 is a wasteful number, since it uses less digits than its factorization.

73217992657781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082851.

The product of its digits is 560105280, while the sum is 74.

The spelling of 73217992657781 in words is "seventy-three trillion, two hundred seventeen billion, nine hundred ninety-two million, six hundred fifty-seven thousand, seven hundred eighty-one".