1297647997078 has 8 divisors (see below), whose sum is σ = 1946660328072. Its totient is φ = 648761221056.

The previous prime is 1297647997073. The next prime is 1297647997117. The reversal of 1297647997078 is 8707997467921.

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

It is a junction number, because it is equal to n+sod(n) for n = 1297647996995 and 1297647997013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297647997073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31362900 + ... + 31404247.

It is an arithmetic number, because the mean of its divisors is an integer number (243332541009).

Almost surely, 2^{1297647997078} is an apocalyptic number.

1297647997078 is a deficient number, since it is larger than the sum of its proper divisors (649012330994).

1297647997078 is a wasteful number, since it uses less digits than its factorization.

1297647997078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62777486.

The product of its (nonzero) digits is 672126336, while the sum is 76.

The spelling of 1297647997078 in words is "one trillion, two hundred ninety-seven billion, six hundred forty-seven million, nine hundred ninety-seven thousand, seventy-eight".