12478890581993 has 4 divisors (see below), whose sum is σ = 13613335180368. Its totient is φ = 11344445983620.

The previous prime is 12478890581987. The next prime is 12478890582031. The reversal of 12478890581993 is 39918509887421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12478890581993 - 2⁴ = 12478890581977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12478890581993.

It is not an unprimeable number, because it can be changed into a prime (12478890581693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567222299171 + ... + 567222299192.

It is an arithmetic number, because the mean of its divisors is an integer number (3403333795092).

Almost surely, 2^{12478890581993} is an apocalyptic number.

It is an amenable number.

12478890581993 is a deficient number, since it is larger than the sum of its proper divisors (1134444598375).

12478890581993 is a wasteful number, since it uses less digits than its factorization.

12478890581993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134444598374.

The product of its (nonzero) digits is 313528320, while the sum is 74.

The spelling of 12478890581993 in words is "twelve trillion, four hundred seventy-eight billion, eight hundred ninety million, five hundred eighty-one thousand, nine hundred ninety-three".