148959978049 has 4 divisors (see below), whose sum is σ = 149435888836. Its totient is φ = 148484067264.

The previous prime is 148959978031. The next prime is 148959978053. The reversal of 148959978049 is 940879959841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940879959841 = 256049 ⋅3674609.

It can be written as a sum of positive squares in 2 ways, for example, as 19696719025 + 129263259024 = 140345^2 + 359532^2 .

It is a cyclic number.

It is not a de Polignac number, because 148959978049 - 2¹⁹ = 148959453761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148959978649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 237954924 + ... + 237955549.

It is an arithmetic number, because the mean of its divisors is an integer number (37358972209).

Almost surely, 2^148959978049 is an apocalyptic number.

It is an amenable number.

148959978049 is a deficient number, since it is larger than the sum of its proper divisors (475910787).

148959978049 is an equidigital number, since it uses as much as digits as its factorization.

148959978049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475910786.

The product of its (nonzero) digits is 235146240, while the sum is 73.

The spelling of 148959978049 in words is "one hundred forty-eight billion, nine hundred fifty-nine million, nine hundred seventy-eight thousand, forty-nine".