9129139555 has 4 divisors (see below), whose sum is σ = 10954967472. Its totient is φ = 7303311640.

The previous prime is 9129139549. The next prime is 9129139559. The reversal of 9129139555 is 5559319219.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-9129139555 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9129139499 and 9129139508.

It is not an unprimeable number, because it can be changed into a prime (9129139559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912913951 + ... + 912913960.

It is an arithmetic number, because the mean of its divisors is an integer number (2738741868).

Almost surely, 2^9129139555 is an apocalyptic number.

9129139555 is a deficient number, since it is larger than the sum of its proper divisors (1825827917).

9129139555 is a wasteful number, since it uses less digits than its factorization.

9129139555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825827916.

The product of its digits is 546750, while the sum is 49.

The square root of 9129139555 is about 95546.5308370744. The cubic root of 9129139555 is about 2089.9855431949.

The spelling of 9129139555 in words is "nine billion, one hundred twenty-nine million, one hundred thirty-nine thousand, five hundred fifty-five".