15606054521 has 2 divisors, whose sum is σ = 15606054522. Its totient is φ = 15606054520.

The previous prime is 15606054467. The next prime is 15606054551. The reversal of 15606054521 is 12545060651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8402288896 + 7203765625 = 91664^2 + 84875^2 .

It is a cyclic number.

It is not a de Polignac number, because 15606054521 - 2²² = 15601860217 is a prime.

It is not a weakly prime, because it can be changed into another prime (15606054551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7803027260 + 7803027261.

It is an arithmetic number, because the mean of its divisors is an integer number (7803027261).

Almost surely, 2^15606054521 is an apocalyptic number.

It is an amenable number.

15606054521 is a deficient number, since it is larger than the sum of its proper divisors (1).

15606054521 is an equidigital number, since it uses as much as digits as its factorization.

15606054521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 15606054521 in words is "fifteen billion, six hundred six million, fifty-four thousand, five hundred twenty-one".