72867261306243 has 4 divisors (see below), whose sum is σ = 97156348408328. Its totient is φ = 48578174204160.

The previous prime is 72867261306211. The next prime is 72867261306247. The reversal of 72867261306243 is 34260316276827.

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

It is not a de Polignac number, because 72867261306243 - 2⁵ = 72867261306211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72867261306247) 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, 12144543551038 + ... + 12144543551043.

It is an arithmetic number, because the mean of its divisors is an integer number (24289087102082).

Almost surely, 2^{72867261306243} is an apocalyptic number.

72867261306243 is a deficient number, since it is larger than the sum of its proper divisors (24289087102085).

72867261306243 is a wasteful number, since it uses less digits than its factorization.

72867261306243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24289087102084.

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 72867261306243 in words is "seventy-two trillion, eight hundred sixty-seven billion, two hundred sixty-one million, three hundred six thousand, two hundred forty-three".