16120531391 has 2 divisors, whose sum is σ = 16120531392. Its totient is φ = 16120531390.

The previous prime is 16120531379. The next prime is 16120531417. The reversal of 16120531391 is 19313502161.

It is a weak prime.

It is an emirp because it is prime and its reverse (19313502161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16120531391 - 2¹⁰ = 16120530367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16120531291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8060265695 + 8060265696.

It is an arithmetic number, because the mean of its divisors is an integer number (8060265696).

Almost surely, 2^16120531391 is an apocalyptic number.

16120531391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16120531391 is an equidigital number, since it uses as much as digits as its factorization.

16120531391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The spelling of 16120531391 in words is "sixteen billion, one hundred twenty million, five hundred thirty-one thousand, three hundred ninety-one".