1378452859245 has 144 divisors (see below), whose sum is σ = 3106040333760. Its totient is φ = 558890841600.

The previous prime is 1378452859237. The next prime is 1378452859261. The reversal of 1378452859245 is 5429582548731.

It is a happy number.

1378452859245 is a `hidden beast` number, since 1 + 3 + 7 + 84 + 528 + 5 + 9 + 24 + 5 = 666.

It is not a de Polignac number, because 1378452859245 - 2³ = 1378452859237 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 301386 + ... + 1687524.

It is an arithmetic number, because the mean of its divisors is an integer number (21569724540).

Almost surely, 2^{1378452859245} is an apocalyptic number.

1378452859245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378452859245 is an abundant number, since it is smaller than the sum of its proper divisors (1727587474515).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378452859245 is a wasteful number, since it uses less digits than its factorization.

1378452859245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386216 (or 1386206 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 1378452859245 in words is "one trillion, three hundred seventy-eight billion, four hundred fifty-two million, eight hundred fifty-nine thousand, two hundred forty-five".