1452378738646 has 16 divisors (see below), whose sum is σ = 2376957451968. Its totient is φ = 660078349000.

The previous prime is 1452378738641. The next prime is 1452378738647. The reversal of 1452378738646 is 6468378732541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1452378738641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4531780 + ... + 4841671.

It is an arithmetic number, because the mean of its divisors is an integer number (148559840748).

Almost surely, 2^{1452378738646} is an apocalyptic number.

1452378738646 is a deficient number, since it is larger than the sum of its proper divisors (924578713322).

1452378738646 is a wasteful number, since it uses less digits than its factorization.

1452378738646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9380507.

The product of its digits is 162570240, while the sum is 64.

The spelling of 1452378738646 in words is "one trillion, four hundred fifty-two billion, three hundred seventy-eight million, seven hundred thirty-eight thousand, six hundred forty-six".