149968578897 has 20 divisors (see below), whose sum is σ = 229491217956. Its totient is φ = 97540536960.

The previous prime is 149968578847. The next prime is 149968578899. The reversal of 149968578897 is 798875869941.

149968578897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15423404481 + 134545174416 = 124191^2 + 366804^2 .

It is not a de Polignac number, because 149968578897 - 2¹⁵ = 149968546129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (149968578899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22575508 + ... + 22582149.

Almost surely, 2^149968578897 is an apocalyptic number.

It is an amenable number.

149968578897 is a deficient number, since it is larger than the sum of its proper divisors (79522639059).

149968578897 is an equidigital number, since it uses as much as digits as its factorization.

149968578897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45157710 (or 45157701 counting only the distinct ones).

The product of its digits is 2194698240, while the sum is 81.

The spelling of 149968578897 in words is "one hundred forty-nine billion, nine hundred sixty-eight million, five hundred seventy-eight thousand, eight hundred ninety-seven".