16139885077 has 2 divisors, whose sum is σ = 16139885078. Its totient is φ = 16139885076.

The previous prime is 16139885057. The next prime is 16139885087. The reversal of 16139885077 is 77058893161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12767644036 + 3372241041 = 112994^2 + 58071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16139885077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16139885057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8069942538 + 8069942539.

It is an arithmetic number, because the mean of its divisors is an integer number (8069942539).

Almost surely, 2^16139885077 is an apocalyptic number.

It is an amenable number.

16139885077 is a deficient number, since it is larger than the sum of its proper divisors (1).

16139885077 is an equidigital number, since it uses as much as digits as its factorization.

16139885077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 16139885077 in words is "sixteen billion, one hundred thirty-nine million, eight hundred eighty-five thousand, seventy-seven".