72738427292779 has 2 divisors, whose sum is σ = 72738427292780. Its totient is φ = 72738427292778.

The previous prime is 72738427292749. The next prime is 72738427292827. The reversal of 72738427292779 is 97729272483727.

It is a weak prime.

It is an emirp because it is prime and its reverse (97729272483727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72738427292779 - 2⁵ = 72738427292747 is a prime.

It is a super-3 number, since 3×72738427292779³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (72738427292749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369213646389 + 36369213646390.

It is an arithmetic number, because the mean of its divisors is an integer number (36369213646390).

Almost surely, 2^{72738427292779} is an apocalyptic number.

72738427292779 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738427292779 is an equidigital number, since it uses as much as digits as its factorization.

72738427292779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2091059712, while the sum is 76.

The spelling of 72738427292779 in words is "seventy-two trillion, seven hundred thirty-eight billion, four hundred twenty-seven million, two hundred ninety-two thousand, seven hundred seventy-nine".