72731030377 has 2 divisors, whose sum is σ = 72731030378. Its totient is φ = 72731030376.

The previous prime is 72731030371. The next prime is 72731030413. The reversal of 72731030377 is 77303013727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62372065536 + 10358964841 = 249744^2 + 101779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72731030377 is a prime.

It is not a weakly prime, because it can be changed into another prime (72731030371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36365515188 + 36365515189.

It is an arithmetic number, because the mean of its divisors is an integer number (36365515189).

Almost surely, 2^72731030377 is an apocalyptic number.

It is an amenable number.

72731030377 is a deficient number, since it is larger than the sum of its proper divisors (1).

72731030377 is an equidigital number, since it uses as much as digits as its factorization.

72731030377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129654, while the sum is 40.

The spelling of 72731030377 in words is "seventy-two billion, seven hundred thirty-one million, thirty thousand, three hundred seventy-seven".