1875208145645 has 4 divisors (see below), whose sum is σ = 2250249774780. Its totient is φ = 1500166516512.

The previous prime is 1875208145617. The next prime is 1875208145729. The reversal of 1875208145645 is 5465418025781.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 379921838884 + 1495286306761 = 616378^2 + 1222819^2 .

It is a cyclic number.

It is not a de Polignac number, because 1875208145645 - 2²⁶ = 1875141036781 is a prime.

It is a super-3 number, since 3×1875208145645³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187520814560 + ... + 187520814569.

It is an arithmetic number, because the mean of its divisors is an integer number (562562443695).

Almost surely, 2^{1875208145645} is an apocalyptic number.

It is an amenable number.

1875208145645 is a deficient number, since it is larger than the sum of its proper divisors (375041629135).

1875208145645 is an equidigital number, since it uses as much as digits as its factorization.

1875208145645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375041629134.

The product of its (nonzero) digits is 10752000, while the sum is 56.

The spelling of 1875208145645 in words is "one trillion, eight hundred seventy-five billion, two hundred eight million, one hundred forty-five thousand, six hundred forty-five".