1378911745 has 32 divisors (see below), whose sum is σ = 1757847168. Its totient is φ = 1036965888.

The previous prime is 1378911739. The next prime is 1378911761. The reversal of 1378911745 is 5471198731.

It is a cyclic number.

It is not a de Polignac number, because 1378911745 - 2¹⁹ = 1378387457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1378911695 and 1378911704.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770742 + ... + 772528.

It is an arithmetic number, because the mean of its divisors is an integer number (54932724).

Almost surely, 2^1378911745 is an apocalyptic number.

It is an amenable number.

1378911745 is a deficient number, since it is larger than the sum of its proper divisors (378935423).

1378911745 is a wasteful number, since it uses less digits than its factorization.

1378911745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969.

The product of its digits is 211680, while the sum is 46.

The square root of 1378911745 is about 37133.7009332493. The cubic root of 1378911745 is about 1113.0435490576.

The spelling of 1378911745 in words is "one billion, three hundred seventy-eight million, nine hundred eleven thousand, seven hundred forty-five".