72345487667 has 2 divisors, whose sum is σ = 72345487668. Its totient is φ = 72345487666.

The previous prime is 72345487637. The next prime is 72345487723. The reversal of 72345487667 is 76678454327.

It is a weak prime.

It is an emirp because it is prime and its reverse (76678454327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72345487667 - 2²⁰ = 72344439091 is a prime.

It is not a weakly prime, because it can be changed into another prime (72345487637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36172743833 + 36172743834.

It is an arithmetic number, because the mean of its divisors is an integer number (36172743834).

Almost surely, 2^72345487667 is an apocalyptic number.

72345487667 is a deficient number, since it is larger than the sum of its proper divisors (1).

72345487667 is an equidigital number, since it uses as much as digits as its factorization.

72345487667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47416320, while the sum is 59.

The spelling of 72345487667 in words is "seventy-two billion, three hundred forty-five million, four hundred eighty-seven thousand, six hundred sixty-seven".