123980815567 has 16 divisors (see below), whose sum is σ = 151354896192. Its totient is φ = 99133009920.

The previous prime is 123980815529. The next prime is 123980815603. The reversal of 123980815567 is 765518089321.

It is a de Polignac number, because none of the positive numbers 2^k-123980815567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123980815667) 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 in 15 ways as a sum of consecutive naturals, for example, 4596534 + ... + 4623427.

It is an arithmetic number, because the mean of its divisors is an integer number (9459681012).

Almost surely, 2^123980815567 is an apocalyptic number.

123980815567 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

123980815567 is a deficient number, since it is larger than the sum of its proper divisors (27374080625).

123980815567 is a wasteful number, since it uses less digits than its factorization.

123980815567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9220098.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 123980815567 in words is "one hundred twenty-three billion, nine hundred eighty million, eight hundred fifteen thousand, five hundred sixty-seven".