15606106553 has 2 divisors, whose sum is σ = 15606106554. Its totient is φ = 15606106552.

The previous prime is 15606106511. The next prime is 15606106561. The reversal of 15606106553 is 35560160651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14698410169 + 907696384 = 121237^2 + 30128^2 .

It is a cyclic number.

It is not a de Polignac number, because 15606106553 - 2⁶ = 15606106489 is a prime.

It is not a weakly prime, because it can be changed into another prime (15609106553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7803053276 + 7803053277.

It is an arithmetic number, because the mean of its divisors is an integer number (7803053277).

Almost surely, 2^15606106553 is an apocalyptic number.

It is an amenable number.

15606106553 is a deficient number, since it is larger than the sum of its proper divisors (1).

15606106553 is an equidigital number, since it uses as much as digits as its factorization.

15606106553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 15606106553 in words is "fifteen billion, six hundred six million, one hundred six thousand, five hundred fifty-three".