102139845436 has 12 divisors (see below), whose sum is σ = 178764224800. Its totient is φ = 51064352640.

The previous prime is 102139845433. The next prime is 102139845443. The reversal of 102139845436 is 634548931201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102139845433) 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 in 3 ways as a sum of consecutive naturals, for example, 1351125 + ... + 1424716.

Almost surely, 2^102139845436 is an apocalyptic number.

It is an amenable number.

102139845436 is a deficient number, since it is larger than the sum of its proper divisors (76624379364).

102139845436 is a wasteful number, since it uses less digits than its factorization.

102139845436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785044 (or 2785042 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 102139845436 in words is "one hundred two billion, one hundred thirty-nine million, eight hundred forty-five thousand, four hundred thirty-six".