12551109697 has 16 divisors (see below), whose sum is σ = 14805894400. Its totient is φ = 10414692288.

The previous prime is 12551109677. The next prime is 12551109719. The reversal of 12551109697 is 79690115521.

It is not a de Polignac number, because 12551109697 - 2¹¹ = 12551107649 is a prime.

It is a super-2 number, since 2×12551109697² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12551109647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70218 + ... + 173299.

It is an arithmetic number, because the mean of its divisors is an integer number (925368400).

Almost surely, 2^12551109697 is an apocalyptic number.

It is an amenable number.

12551109697 is a deficient number, since it is larger than the sum of its proper divisors (2254784703).

12551109697 is a wasteful number, since it uses less digits than its factorization.

12551109697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243760.

The product of its (nonzero) digits is 170100, while the sum is 46.

The spelling of 12551109697 in words is "twelve billion, five hundred fifty-one million, one hundred nine thousand, six hundred ninety-seven".