12440396697 has 32 divisors (see below), whose sum is σ = 17696931840. Its totient is φ = 7746382080.

The previous prime is 12440396687. The next prime is 12440396729. The reversal of 12440396697 is 79669304421.

It is a happy number.

It is not a de Polignac number, because 12440396697 - 2⁷ = 12440396569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (12440396687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4898454 + ... + 4900992.

It is an arithmetic number, because the mean of its divisors is an integer number (553029120).

Almost surely, 2^12440396697 is an apocalyptic number.

12440396697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12440396697 is a deficient number, since it is larger than the sum of its proper divisors (5256535143).

12440396697 is a wasteful number, since it uses less digits than its factorization.

12440396697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 12440396697 in words is "twelve billion, four hundred forty million, three hundred ninety-six thousand, six hundred ninety-seven".