12739559550 has 24 divisors (see below), whose sum is σ = 31594108056. Its totient is φ = 3397215840.

The previous prime is 12739559549. The next prime is 12739559587. The reversal of 12739559550 is 5595593721.

It is a junction number, because it is equal to n+sod(n) for n = 12739559493 and 12739559502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42465049 + ... + 42465348.

It is an arithmetic number, because the mean of its divisors is an integer number (1316421169).

Almost surely, 2^12739559550 is an apocalyptic number.

12739559550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12739559550 is an abundant number, since it is smaller than the sum of its proper divisors (18854548506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12739559550 is a wasteful number, since it uses less digits than its factorization.

12739559550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84930412 (or 84930407 counting only the distinct ones).

The product of its (nonzero) digits is 2126250, while the sum is 51.

The spelling of 12739559550 in words is "twelve billion, seven hundred thirty-nine million, five hundred fifty-nine thousand, five hundred fifty".