148809645 has 24 divisors (see below), whose sum is σ = 258312600. Its totient is φ = 79249536.

The previous prime is 148809631. The next prime is 148809673. The reversal of 148809645 is 546908841.

It can be written as a sum of positive squares in 4 ways, for example, as 17065161 + 131744484 = 4131^2 + 11478^2 .

It is not a de Polignac number, because 148809645 - 2¹¹ = 148807597 is a prime.

It is a super-3 number, since 3×148809645³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 148809645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35311 + ... + 39299.

It is an arithmetic number, because the mean of its divisors is an integer number (10763025).

Almost surely, 2^148809645 is an apocalyptic number.

148809645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

148809645 is a deficient number, since it is larger than the sum of its proper divisors (109502955).

148809645 is a wasteful number, since it uses less digits than its factorization.

148809645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4829 (or 4826 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 148809645 is about 12198.7558791870. The cubic root of 148809645 is about 529.9200603297.

The spelling of 148809645 in words is "one hundred forty-eight million, eight hundred nine thousand, six hundred forty-five".