1378840621345 has 8 divisors (see below), whose sum is σ = 1805027722560. Its totient is φ = 1002793179120.

The previous prime is 1378840621303. The next prime is 1378840621423. The reversal of 1378840621345 is 5431260488731.

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

It is not a de Polignac number, because 1378840621345 - 2⁷ = 1378840621217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378840621292 and 1378840621301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12534914685 + ... + 12534914794.

It is an arithmetic number, because the mean of its divisors is an integer number (225628465320).

Almost surely, 2^{1378840621345} is an apocalyptic number.

It is an amenable number.

1378840621345 is a deficient number, since it is larger than the sum of its proper divisors (426187101215).

1378840621345 is a wasteful number, since it uses less digits than its factorization.

1378840621345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25069829495.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 1378840621345 in words is "one trillion, three hundred seventy-eight billion, eight hundred forty million, six hundred twenty-one thousand, three hundred forty-five".