149728770161 has 4 divisors (see below), whose sum is σ = 150041356800. Its totient is φ = 149416183524.

The previous prime is 149728770101. The next prime is 149728770173. The reversal of 149728770161 is 161077827941.

149728770161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161077827941 = 20369 ⋅7907989.

It is a cyclic number.

It is not a de Polignac number, because 149728770161 - 2²⁶ = 149661661297 is a prime.

It is a super-2 number, since 2×149728770161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149728770101) 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 3 ways as a sum of consecutive naturals, for example, 156292601 + ... + 156293558.

It is an arithmetic number, because the mean of its divisors is an integer number (37510339200).

Almost surely, 2^149728770161 is an apocalyptic number.

It is an amenable number.

149728770161 is a deficient number, since it is larger than the sum of its proper divisors (312586639).

149728770161 is an equidigital number, since it uses as much as digits as its factorization.

149728770161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312586638.

The product of its (nonzero) digits is 1185408, while the sum is 53.

The spelling of 149728770161 in words is "one hundred forty-nine billion, seven hundred twenty-eight million, seven hundred seventy thousand, one hundred sixty-one".