12497756509 has 8 divisors (see below), whose sum is σ = 14775672960. Its totient is φ = 10342970736.

The previous prime is 12497756477. The next prime is 12497756591. The reversal of 12497756509 is 90565779421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12497756509 - 2⁵ = 12497756477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12497756509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12497756809) 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, 30782449 + ... + 30782854.

It is an arithmetic number, because the mean of its divisors is an integer number (1846959120).

Almost surely, 2^12497756509 is an apocalyptic number.

It is an amenable number.

12497756509 is a deficient number, since it is larger than the sum of its proper divisors (2277916451).

12497756509 is an equidigital number, since it uses as much as digits as its factorization.

12497756509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61565339.

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 12497756509 in words is "twelve billion, four hundred ninety-seven million, seven hundred fifty-six thousand, five hundred nine".