12139540755 has 32 divisors (see below), whose sum is σ = 19611279360. Its totient is φ = 6412053120.

The previous prime is 12139540729. The next prime is 12139540823. The reversal of 12139540755 is 55704593121.

It is a happy number.

It is not a de Polignac number, because 12139540755 - 2⁷ = 12139540627 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 646834 + ... + 665336.

It is an arithmetic number, because the mean of its divisors is an integer number (612852480).

Almost surely, 2^12139540755 is an apocalyptic number.

12139540755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12139540755 is a deficient number, since it is larger than the sum of its proper divisors (7471738605).

12139540755 is a wasteful number, since it uses less digits than its factorization.

12139540755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18931.

The product of its (nonzero) digits is 189000, while the sum is 42.

The spelling of 12139540755 in words is "twelve billion, one hundred thirty-nine million, five hundred forty thousand, seven hundred fifty-five".