12889649903533 has 4 divisors (see below), whose sum is σ = 13881161434588. Its totient is φ = 11898138372480.

The previous prime is 12889649903521. The next prime is 12889649903561. The reversal of 12889649903533 is 33530994698821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4809064789764 + 8080585113769 = 2192958^2 + 2842637^2 .

It is a cyclic number.

It is not a de Polignac number, because 12889649903533 - 2²¹ = 12889647806381 is a prime.

It is a super-2 number, since 2×12889649903533² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12889649903593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495755765508 + ... + 495755765533.

It is an arithmetic number, because the mean of its divisors is an integer number (3470290358647).

Almost surely, 2^{12889649903533} is an apocalyptic number.

12889649903533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12889649903533 is a deficient number, since it is larger than the sum of its proper divisors (991511531055).

12889649903533 is an equidigital number, since it uses as much as digits as its factorization.

12889649903533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991511531054.

The product of its (nonzero) digits is 302330880, while the sum is 70.

The spelling of 12889649903533 in words is "twelve trillion, eight hundred eighty-nine billion, six hundred forty-nine million, nine hundred three thousand, five hundred thirty-three".