12890951787 has 16 divisors (see below), whose sum is σ = 19679681792. Its totient is φ = 7352635680.

The previous prime is 12890951779. The next prime is 12890951789. The reversal of 12890951787 is 78715909821.

It is not a de Polignac number, because 12890951787 - 2³ = 12890951779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12890951789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555973 + ... + 578694.

It is an arithmetic number, because the mean of its divisors is an integer number (1229980112).

Almost surely, 2^12890951787 is an apocalyptic number.

12890951787 is a deficient number, since it is larger than the sum of its proper divisors (6788730005).

12890951787 is a wasteful number, since it uses less digits than its factorization.

12890951787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135218.

The product of its (nonzero) digits is 2540160, while the sum is 57.

The spelling of 12890951787 in words is "twelve billion, eight hundred ninety million, nine hundred fifty-one thousand, seven hundred eighty-seven".