12681420550 has 24 divisors (see below), whose sum is σ = 23728700016. Its totient is φ = 5042190240.

The previous prime is 12681420541. The next prime is 12681420559. The reversal of 12681420550 is 5502418621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12681420541) and next prime (12681420559).

It is a super-3 number, since 3×12681420550³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681420559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 751017 + ... + 767716.

It is an arithmetic number, because the mean of its divisors is an integer number (988695834).

Almost surely, 2^12681420550 is an apocalyptic number.

12681420550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12681420550 is a deficient number, since it is larger than the sum of its proper divisors (11047279466).

12681420550 is a wasteful number, since it uses less digits than its factorization.

12681420550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518912 (or 1518907 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 12681420550 in words is "twelve billion, six hundred eighty-one million, four hundred twenty thousand, five hundred fifty".