12456688890 has 16 divisors (see below), whose sum is σ = 29896053408. Its totient is φ = 3321783696.

The previous prime is 12456688889. The next prime is 12456688931. The reversal of 12456688890 is 9888665421.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12456688890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207611452 + ... + 207611511.

It is an arithmetic number, because the mean of its divisors is an integer number (1868503338).

Almost surely, 2^12456688890 is an apocalyptic number.

12456688890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12456688890 is an abundant number, since it is smaller than the sum of its proper divisors (17439364518).

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

12456688890 is a wasteful number, since it uses less digits than its factorization.

12456688890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415222973.

The product of its (nonzero) digits is 6635520, while the sum is 57.

The spelling of 12456688890 in words is "twelve billion, four hundred fifty-six million, six hundred eighty-eight thousand, eight hundred ninety".