15606139057 has 2 divisors, whose sum is σ = 15606139058. Its totient is φ = 15606139056.

The previous prime is 15606139013. The next prime is 15606139097. The reversal of 15606139057 is 75093160651.

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., 11001702321 + 4604436736 = 104889^2 + 67856^2 .

It is a cyclic number.

It is not a de Polignac number, because 15606139057 - 2¹⁵ = 15606106289 is a prime.

It is not a weakly prime, because it can be changed into another prime (15606139097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7803069528 + 7803069529.

It is an arithmetic number, because the mean of its divisors is an integer number (7803069529).

Almost surely, 2^15606139057 is an apocalyptic number.

It is an amenable number.

15606139057 is a deficient number, since it is larger than the sum of its proper divisors (1).

15606139057 is an equidigital number, since it uses as much as digits as its factorization.

15606139057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 43.

The spelling of 15606139057 in words is "fifteen billion, six hundred six million, one hundred thirty-nine thousand, fifty-seven".