72880284205669 has 4 divisors (see below), whose sum is σ = 72929494392300. Its totient is φ = 72831074019040.

The previous prime is 72880284205667. The next prime is 72880284205681. The reversal of 72880284205669 is 96650248208827.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18977889875044 + 53902394330625 = 4356362^2 + 7341825^2 .

It is a cyclic number.

It is not a de Polignac number, because 72880284205669 - 2¹ = 72880284205667 is a prime.

It is a super-2 number, since 2×72880284205669² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72880284205661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24605091094 + ... + 24605094055.

It is an arithmetic number, because the mean of its divisors is an integer number (18232373598075).

Almost surely, 2^{72880284205669} is an apocalyptic number.

It is an amenable number.

72880284205669 is a deficient number, since it is larger than the sum of its proper divisors (49210186631).

72880284205669 is a wasteful number, since it uses less digits than its factorization.

72880284205669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49210186630.

The product of its (nonzero) digits is 185794560, while the sum is 67.

The spelling of 72880284205669 in words is "seventy-two trillion, eight hundred eighty billion, two hundred eighty-four million, two hundred five thousand, six hundred sixty-nine".