72420356287 has 2 divisors, whose sum is σ = 72420356288. Its totient is φ = 72420356286.

The previous prime is 72420356237. The next prime is 72420356291. The reversal of 72420356287 is 78265302427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72420356287 - 2⁷ = 72420356159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72420356237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36210178143 + 36210178144.

It is an arithmetic number, because the mean of its divisors is an integer number (36210178144).

Almost surely, 2^72420356287 is an apocalyptic number.

72420356287 is a deficient number, since it is larger than the sum of its proper divisors (1).

72420356287 is an equidigital number, since it uses as much as digits as its factorization.

72420356287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 72420356287 in words is "seventy-two billion, four hundred twenty million, three hundred fifty-six thousand, two hundred eighty-seven".