12447788890 has 16 divisors (see below), whose sum is σ = 22423318632. Its totient is φ = 4975271424.

The previous prime is 12447788849. The next prime is 12447788911. The reversal of 12447788890 is 9888774421.

It can be written as a sum of positive squares in 4 ways, for example, as 11642194201 + 805594689 = 107899^2 + 28383^2 .

It is a super-4 number, since 4×12447788890⁴ (a number of 41 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466899 + ... + 492838.

Almost surely, 2^12447788890 is an apocalyptic number.

12447788890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12447788890 is a deficient number, since it is larger than the sum of its proper divisors (9975529742).

12447788890 is a wasteful number, since it uses less digits than its factorization.

12447788890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961041.

The product of its (nonzero) digits is 7225344, while the sum is 58.

The spelling of 12447788890 in words is "twelve billion, four hundred forty-seven million, seven hundred eighty-eight thousand, eight hundred ninety".