72646511887 has 2 divisors, whose sum is σ = 72646511888. Its totient is φ = 72646511886.

The previous prime is 72646511869. The next prime is 72646511909. The reversal of 72646511887 is 78811564627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72646511887 - 2⁷ = 72646511759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72646511827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36323255943 + 36323255944.

It is an arithmetic number, because the mean of its divisors is an integer number (36323255944).

Almost surely, 2^72646511887 is an apocalyptic number.

72646511887 is a deficient number, since it is larger than the sum of its proper divisors (1).

72646511887 is an equidigital number, since it uses as much as digits as its factorization.

72646511887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 55.

The spelling of 72646511887 in words is "seventy-two billion, six hundred forty-six million, five hundred eleven thousand, eight hundred eighty-seven".