3547807785845 has 4 divisors (see below), whose sum is σ = 4257369343020. Its totient is φ = 2838246228672.

The previous prime is 3547807785839. The next prime is 3547807785853. The reversal of 3547807785845 is 5485877087453.

3547807785845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 892478873521 + 2655328912324 = 944711^2 + 1629518^2 .

It is a cyclic number.

It is not a de Polignac number, because 3547807785845 - 2⁸ = 3547807785589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354780778580 + ... + 354780778589.

It is an arithmetic number, because the mean of its divisors is an integer number (1064342335755).

Almost surely, 2^{3547807785845} is an apocalyptic number.

It is an amenable number.

3547807785845 is a deficient number, since it is larger than the sum of its proper divisors (709561557175).

3547807785845 is an equidigital number, since it uses as much as digits as its factorization.

3547807785845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709561557174.

The product of its (nonzero) digits is 1053696000, while the sum is 71.

The spelling of 3547807785845 in words is "three trillion, five hundred forty-seven billion, eight hundred seven million, seven hundred eighty-five thousand, eight hundred forty-five".