12990817040 has 40 divisors (see below), whose sum is σ = 30219101568. Its totient is φ = 5193668480.

The previous prime is 12990817033. The next prime is 12990817097. The reversal of 12990817040 is 4071809921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×12990817040² (a number of 21 digits) contains 22 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, 119705 + ... + 200775.

Almost surely, 2^12990817040 is an apocalyptic number.

12990817040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12990817040 is an abundant number, since it is smaller than the sum of its proper divisors (17228284528).

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

12990817040 is a wasteful number, since it uses less digits than its factorization.

12990817040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83087 (or 83081 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 12990817040 in words is "twelve billion, nine hundred ninety million, eight hundred seventeen thousand, forty".