12697155544 has 16 divisors (see below), whose sum is σ = 23809756320. Its totient is φ = 6347887200.

The previous prime is 12697155529. The next prime is 12697155547. The reversal of 12697155544 is 44555179621.

It is a super-2 number, since 2×12697155544² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697155547) 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, 3507 + ... + 159394.

It is an arithmetic number, because the mean of its divisors is an integer number (1488109770).

Almost surely, 2^12697155544 is an apocalyptic number.

It is an amenable number.

12697155544 is a deficient number, since it is larger than the sum of its proper divisors (11112600776).

12697155544 is a wasteful number, since it uses less digits than its factorization.

12697155544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172650 (or 172646 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 49.

The spelling of 12697155544 in words is "twelve billion, six hundred ninety-seven million, one hundred fifty-five thousand, five hundred forty-four".