16523442139 has 2 divisors, whose sum is σ = 16523442140. Its totient is φ = 16523442138.

The previous prime is 16523442097. The next prime is 16523442157. The reversal of 16523442139 is 93124432561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16523442139 - 2²³ = 16515053531 is a prime.

It is not a weakly prime, because it can be changed into another prime (16523442239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8261721069 + 8261721070.

It is an arithmetic number, because the mean of its divisors is an integer number (8261721070).

Almost surely, 2^16523442139 is an apocalyptic number.

16523442139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16523442139 is an equidigital number, since it uses as much as digits as its factorization.

16523442139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The spelling of 16523442139 in words is "sixteen billion, five hundred twenty-three million, four hundred forty-two thousand, one hundred thirty-nine".