1378901745 has 128 divisors (see below), whose sum is σ = 2744985600. Its totient is φ = 652437504.

The previous prime is 1378901743. The next prime is 1378901749. The reversal of 1378901745 is 5471098731.

It is not a de Polignac number, because 1378901745 - 2¹ = 1378901743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1378901745.

It is not an unprimeable number, because it can be changed into a prime (1378901743) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6021291 + ... + 6021519.

It is an arithmetic number, because the mean of its divisors is an integer number (21445200).

Almost surely, 2^1378901745 is an apocalyptic number.

1378901745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378901745 is a deficient number, since it is larger than the sum of its proper divisors (1366083855).

1378901745 is a wasteful number, since it uses less digits than its factorization.

1378901745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 1378901745 is about 37133.5662844279. The cubic root of 1378901745 is about 1113.0408584183.

The spelling of 1378901745 in words is "one billion, three hundred seventy-eight million, nine hundred one thousand, seven hundred forty-five".