1645303401373 has 8 divisors (see below), whose sum is σ = 1685553481080. Its totient is φ = 1605059070720.

The previous prime is 1645303401349. The next prime is 1645303401383. The reversal of 1645303401373 is 3731043035461.

It can be written as a sum of positive squares in 4 ways, for example, as 20244452089 + 1625058949284 = 142283^2 + 1274778^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1645303401373 - 2⁵ = 1645303401341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645303401383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855040 + ... + 2005417.

It is an arithmetic number, because the mean of its divisors is an integer number (210694185135).

Almost surely, 2^{1645303401373} is an apocalyptic number.

It is an amenable number.

1645303401373 is a deficient number, since it is larger than the sum of its proper divisors (40250079707).

1645303401373 is a wasteful number, since it uses less digits than its factorization.

1645303401373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874527.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 1645303401373 in words is "one trillion, six hundred forty-five billion, three hundred three million, four hundred one thousand, three hundred seventy-three".