15201661523 has 2 divisors, whose sum is σ = 15201661524. Its totient is φ = 15201661522.

The previous prime is 15201661481. The next prime is 15201661537. The reversal of 15201661523 is 32516610251.

15201661523 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 is a cyclic number.

It is not a de Polignac number, because 15201661523 - 2⁶ = 15201661459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15201661523.

It is not a weakly prime, because it can be changed into another prime (15201661723) 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, 7600830761 + 7600830762.

It is an arithmetic number, because the mean of its divisors is an integer number (7600830762).

Almost surely, 2^15201661523 is an apocalyptic number.

15201661523 is a deficient number, since it is larger than the sum of its proper divisors (1).

15201661523 is an equidigital number, since it uses as much as digits as its factorization.

15201661523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 15201661523 in words is "fifteen billion, two hundred one million, six hundred sixty-one thousand, five hundred twenty-three".