121764679567 has 2 divisors, whose sum is σ = 121764679568. Its totient is φ = 121764679566.

The previous prime is 121764679549. The next prime is 121764679573. The reversal of 121764679567 is 765976467121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121764679567 - 2¹¹ = 121764677519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121764679067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60882339783 + 60882339784.

It is an arithmetic number, because the mean of its divisors is an integer number (60882339784).

Almost surely, 2^121764679567 is an apocalyptic number.

121764679567 is a deficient number, since it is larger than the sum of its proper divisors (1).

121764679567 is an equidigital number, since it uses as much as digits as its factorization.

121764679567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 61.

The spelling of 121764679567 in words is "one hundred twenty-one billion, seven hundred sixty-four million, six hundred seventy-nine thousand, five hundred sixty-seven".