12157990550 has 24 divisors (see below), whose sum is σ = 23095012896. Its totient is φ = 4759723040.

The previous prime is 12157990549. The next prime is 12157990567. The reversal of 12157990550 is 5509975121.

12157990550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2584457 + ... + 2589156.

It is an arithmetic number, because the mean of its divisors is an integer number (962292204).

Almost surely, 2^12157990550 is an apocalyptic number.

12157990550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12157990550 is a deficient number, since it is larger than the sum of its proper divisors (10937022346).

12157990550 is a wasteful number, since it uses less digits than its factorization.

12157990550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173672 (or 5173667 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 44.

The spelling of 12157990550 in words is "twelve billion, one hundred fifty-seven million, nine hundred ninety thousand, five hundred fifty".