1391297678449 has 8 divisors (see below), whose sum is σ = 1598379383808. Its totient is φ = 1186297196640.

The previous prime is 1391297678399. The next prime is 1391297678627. The reversal of 1391297678449 is 9448767921931.

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

It is a cyclic number.

It is not a de Polignac number, because 1391297678449 - 2⁹ = 1391297677937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1391297978449) 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, 520304452 + ... + 520307125.

It is an arithmetic number, because the mean of its divisors is an integer number (199797422976).

Almost surely, 2^{1391297678449} is an apocalyptic number.

It is an amenable number.

1391297678449 is a deficient number, since it is larger than the sum of its proper divisors (207081705359).

1391297678449 is a wasteful number, since it uses less digits than its factorization.

1391297678449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040611775.

The product of its digits is 164602368, while the sum is 70.

The spelling of 1391297678449 in words is "one trillion, three hundred ninety-one billion, two hundred ninety-seven million, six hundred seventy-eight thousand, four hundred forty-nine".