145902861805 has 8 divisors (see below), whose sum is σ = 178386895512. Its totient is φ = 114519981888.

The previous prime is 145902861803. The next prime is 145902861809. The reversal of 145902861805 is 508168209541.

It can be written as a sum of positive squares in 4 ways, for example, as 639735849 + 145263125956 = 25293^2 + 381134^2 .

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 145902861805 - 2¹ = 145902861803 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 (145902861803) 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, 275288154 + ... + 275288683.

It is an arithmetic number, because the mean of its divisors is an integer number (22298361939).

Almost surely, 2^145902861805 is an apocalyptic number.

It is an amenable number.

145902861805 is a deficient number, since it is larger than the sum of its proper divisors (32484033707).

145902861805 is an equidigital number, since it uses as much as digits as its factorization.

145902861805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550576895.

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 145902861805 in words is "one hundred forty-five billion, nine hundred two million, eight hundred sixty-one thousand, eight hundred five".