15505156553 has 2 divisors, whose sum is σ = 15505156554. Its totient is φ = 15505156552.

The previous prime is 15505156531. The next prime is 15505156573. The reversal of 15505156553 is 35565150551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14708110729 + 797045824 = 121277^2 + 28232^2 .

It is a cyclic number.

It is not a de Polignac number, because 15505156553 - 2⁸ = 15505156297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15505156553.

It is not a weakly prime, because it can be changed into another prime (15505156573) 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, 7752578276 + 7752578277.

It is an arithmetic number, because the mean of its divisors is an integer number (7752578277).

Almost surely, 2^15505156553 is an apocalyptic number.

It is an amenable number.

15505156553 is a deficient number, since it is larger than the sum of its proper divisors (1).

15505156553 is an equidigital number, since it uses as much as digits as its factorization.

15505156553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 281250, while the sum is 41.

The spelling of 15505156553 in words is "fifteen billion, five hundred five million, one hundred fifty-six thousand, five hundred fifty-three".