1378552457777 has 8 divisors (see below), whose sum is σ = 1503937162560. Its totient is φ = 1253178045360.

The previous prime is 1378552457719. The next prime is 1378552457797. The reversal of 1378552457777 is 7777542558731.

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 1378552457777 - 2¹⁴ = 1378552441393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378552457797) 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, 2291693 + ... + 2830010.

It is an arithmetic number, because the mean of its divisors is an integer number (187992145320).

Almost surely, 2^{1378552457777} is an apocalyptic number.

It is an amenable number.

1378552457777 is a deficient number, since it is larger than the sum of its proper divisors (125384704783).

1378552457777 is a wasteful number, since it uses less digits than its factorization.

1378552457777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146183.

The product of its digits is 403368000, while the sum is 68.

The spelling of 1378552457777 in words is "one trillion, three hundred seventy-eight billion, five hundred fifty-two million, four hundred fifty-seven thousand, seven hundred seventy-seven".