12890262789 has 6 divisors (see below), whose sum is σ = 18619268486. Its totient is φ = 8593508520.

The previous prime is 12890262743. The next prime is 12890262811. The reversal of 12890262789 is 98726209821.

12890262789 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 0 + 2 + 627 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12890196225 + 66564 = 113535^2 + 258^2 .

It is not a de Polignac number, because 12890262789 - 2¹¹ = 12890260741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12890262709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 716125702 + ... + 716125719.

Almost surely, 2^12890262789 is an apocalyptic number.

It is an amenable number.

12890262789 is a deficient number, since it is larger than the sum of its proper divisors (5729005697).

12890262789 is a wasteful number, since it uses less digits than its factorization.

12890262789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432251427 (or 1432251424 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 12890262789 in words is "twelve billion, eight hundred ninety million, two hundred sixty-two thousand, seven hundred eighty-nine".