12891025654 has 16 divisors (see below), whose sum is σ = 21542033520. Its totient is φ = 5744541600.

The previous prime is 12891025643. The next prime is 12891025657. The reversal of 12891025654 is 45652019821.

It is a super-2 number, since 2×12891025654² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12891025654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891025657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8547672 + ... + 8549179.

It is an arithmetic number, because the mean of its divisors is an integer number (1346377095).

Almost surely, 2^12891025654 is an apocalyptic number.

12891025654 is a deficient number, since it is larger than the sum of its proper divisors (8651007866).

12891025654 is a wasteful number, since it uses less digits than its factorization.

12891025654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17096895.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 12891025654 in words is "twelve billion, eight hundred ninety-one million, twenty-five thousand, six hundred fifty-four".