102432111561 has 18 divisors (see below), whose sum is σ = 160214330718. Its totient is φ = 63035144640.

The previous prime is 102432111443. The next prime is 102432111577. The reversal of 102432111561 is 165111234201.

It can be written as a sum of positive squares in 3 ways, for example, as 2932872336 + 99499239225 = 54156^2 + 315435^2 .

It is not a de Polignac number, because 102432111561 - 2⁷ = 102432111433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102432115561) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33671100 + ... + 33674141.

It is an arithmetic number, because the mean of its divisors is an integer number (8900796151).

Almost surely, 2^102432111561 is an apocalyptic number.

It is an amenable number.

102432111561 is a deficient number, since it is larger than the sum of its proper divisors (57782219157).

102432111561 is a wasteful number, since it uses less digits than its factorization.

102432111561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67345273 (or 67345257 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 102432111561 its reverse (165111234201), we get a palindrome (267543345762).

The spelling of 102432111561 in words is "one hundred two billion, four hundred thirty-two million, one hundred eleven thousand, five hundred sixty-one".