149723592521 has 4 divisors (see below), whose sum is σ = 149986727700. Its totient is φ = 149460457344.

The previous prime is 149723592509. The next prime is 149723592617. The reversal of 149723592521 is 125295327941.

149723592521 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.

It can be written as a sum of positive squares in 2 ways, for example, as 73624852921 + 76098739600 = 271339^2 + 275860^2 .

It is a cyclic number.

It is not a de Polignac number, because 149723592521 - 2⁶ = 149723592457 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 149723592521.

It is not an unprimeable number, because it can be changed into a prime (149723594521) 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, 131566736 + ... + 131567873.

It is an arithmetic number, because the mean of its divisors is an integer number (37496681925).

Almost surely, 2^149723592521 is an apocalyptic number.

It is an amenable number.

149723592521 is a deficient number, since it is larger than the sum of its proper divisors (263135179).

149723592521 is an equidigital number, since it uses as much as digits as its factorization.

149723592521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263135178.

The product of its digits is 1360800, while the sum is 50.

The spelling of 149723592521 in words is "one hundred forty-nine billion, seven hundred twenty-three million, five hundred ninety-two thousand, five hundred twenty-one".