15505625501 has 2 divisors, whose sum is σ = 15505625502. Its totient is φ = 15505625500.

The previous prime is 15505625437. The next prime is 15505625533. The reversal of 15505625501 is 10552650551.

It is a happy number.

15505625501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14562214276 + 943411225 = 120674^2 + 30715^2 .

It is a cyclic number.

It is not a de Polignac number, because 15505625501 - 2⁶ = 15505625437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15505625581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7752812750 + 7752812751.

It is an arithmetic number, because the mean of its divisors is an integer number (7752812751).

Almost surely, 2^15505625501 is an apocalyptic number.

It is an amenable number.

15505625501 is a deficient number, since it is larger than the sum of its proper divisors (1).

15505625501 is an equidigital number, since it uses as much as digits as its factorization.

15505625501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37500, while the sum is 35.

The spelling of 15505625501 in words is "fifteen billion, five hundred five million, six hundred twenty-five thousand, five hundred one".