12897844554 has 16 divisors (see below), whose sum is σ = 29480787648. Its totient is φ = 3685098432.

The previous prime is 12897844543. The next prime is 12897844621. The reversal of 12897844554 is 45544879821.

It is a junction number, because it is equal to n+sod(n) for n = 12897844494 and 12897844503.

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, 153545727 + ... + 153545810.

It is an arithmetic number, because the mean of its divisors is an integer number (1842549228).

Almost surely, 2^12897844554 is an apocalyptic number.

12897844554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12897844554 is an abundant number, since it is smaller than the sum of its proper divisors (16582943094).

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

12897844554 is a wasteful number, since it uses less digits than its factorization.

12897844554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307091549.

The product of its digits is 12902400, while the sum is 57.

The spelling of 12897844554 in words is "twelve billion, eight hundred ninety-seven million, eight hundred forty-four thousand, five hundred fifty-four".