149861182789 has 4 divisors (see below), whose sum is σ = 149900407020. Its totient is φ = 149821958560.

The previous prime is 149861182753. The next prime is 149861182813. The reversal of 149861182789 is 987281168941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987281168941 = 4507 ⋅219055063.

It can be written as a sum of positive squares in 2 ways, for example, as 76650352164 + 73210830625 = 276858^2 + 270575^2 .

It is a cyclic number.

It is not a de Polignac number, because 149861182789 - 2⁷ = 149861182661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149861182789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149861180789) 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, 19606384 + ... + 19614025.

It is an arithmetic number, because the mean of its divisors is an integer number (37475101755).

Almost surely, 2^149861182789 is an apocalyptic number.

It is an amenable number.

149861182789 is a deficient number, since it is larger than the sum of its proper divisors (39224231).

149861182789 is an equidigital number, since it uses as much as digits as its factorization.

149861182789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39224230.

The product of its digits is 13934592, while the sum is 64.

The spelling of 149861182789 in words is "one hundred forty-nine billion, eight hundred sixty-one million, one hundred eighty-two thousand, seven hundred eighty-nine".