72387814768281 has 16 divisors (see below), whose sum is σ = 107241631235200. Its totient is φ = 48258352301904.

The previous prime is 72387814768223. The next prime is 72387814768289. The reversal of 72387814768281 is 18286741878327.

72387814768281 is a `hidden beast` number, since 7 + 2 + 3 + 8 + 78 + 1 + 476 + 8 + 2 + 81 = 666.

It is not a de Polignac number, because 72387814768281 - 2⁷ = 72387814768153 is a prime.

It is a super-2 number, since 2×72387814768281² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72387814768289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1824735 + ... + 12169851.

It is an arithmetic number, because the mean of its divisors is an integer number (6702601952200).

Almost surely, 2^{72387814768281} is an apocalyptic number.

It is an amenable number.

72387814768281 is a deficient number, since it is larger than the sum of its proper divisors (34853816466919).

72387814768281 is a wasteful number, since it uses less digits than its factorization.

72387814768281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10604285 (or 10604279 counting only the distinct ones).

The product of its digits is 404619264, while the sum is 72.

The spelling of 72387814768281 in words is "seventy-two trillion, three hundred eighty-seven billion, eight hundred fourteen million, seven hundred sixty-eight thousand, two hundred eighty-one".