72738903779 has 2 divisors, whose sum is σ = 72738903780. Its totient is φ = 72738903778.

The previous prime is 72738903761. The next prime is 72738903817. The reversal of 72738903779 is 97730983727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72738903779 - 2²⁴ = 72722126563 is a prime.

It is not a weakly prime, because it can be changed into another prime (72738903179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369451889 + 36369451890.

It is an arithmetic number, because the mean of its divisors is an integer number (36369451890).

Almost surely, 2^72738903779 is an apocalyptic number.

72738903779 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738903779 is an equidigital number, since it uses as much as digits as its factorization.

72738903779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28005264, while the sum is 62.

The spelling of 72738903779 in words is "seventy-two billion, seven hundred thirty-eight million, nine hundred three thousand, seven hundred seventy-nine".