72738427292891 has 2 divisors, whose sum is σ = 72738427292892. Its totient is φ = 72738427292890.

The previous prime is 72738427292827. The next prime is 72738427292911. The reversal of 72738427292891 is 19829272483727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72738427292891 - 2⁶ = 72738427292827 is a prime.

It is not a weakly prime, because it can be changed into another prime (72738427292291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369213646445 + 36369213646446.

It is an arithmetic number, because the mean of its divisors is an integer number (36369213646446).

Almost surely, 2^{72738427292891} is an apocalyptic number.

72738427292891 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738427292891 is an equidigital number, since it uses as much as digits as its factorization.

72738427292891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 341397504, while the sum is 71.

The spelling of 72738427292891 in words is "seventy-two trillion, seven hundred thirty-eight billion, four hundred twenty-seven million, two hundred ninety-two thousand, eight hundred ninety-one".