148505805 has 96 divisors (see below), whose sum is σ = 321484800. Its totient is φ = 64245312.

The previous prime is 148505803. The next prime is 148505821. The reversal of 148505805 is 508505841.

148505805 is a `hidden beast` number, since 148 + 505 + 8 + 0 + 5 = 666.

It is not a de Polignac number, because 148505805 - 2¹ = 148505803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 148505805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148505803) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 161136 + ... + 162054.

It is an arithmetic number, because the mean of its divisors is an integer number (3348800).

Almost surely, 2^148505805 is an apocalyptic number.

148505805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

148505805 is an abundant number, since it is smaller than the sum of its proper divisors (172978995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

148505805 is an equidigital number, since it uses as much as digits as its factorization.

148505805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 148505805 is about 12186.2957866613. The cubic root of 148505805 is about 529.5591504353.

Adding to 148505805 its sum of digits (36), we get a palindrome (148505841).

The spelling of 148505805 in words is "one hundred forty-eight million, five hundred five thousand, eight hundred five".