149857320722 has 18 divisors (see below), whose sum is σ = 232829172693. Its totient is φ = 72337248984.

The previous prime is 149857320707. The next prime is 149857320757. The reversal of 149857320722 is 227023758941.

It can be written as a sum of positive squares in 2 ways, for example, as 149768226001 + 89094721 = 386999^2 + 9439^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=273731.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 15871679 + ... + 15881117.

Almost surely, 2^149857320722 is an apocalyptic number.

149857320722 is a deficient number, since it is larger than the sum of its proper divisors (82971851971).

149857320722 is an frugal number, since it uses more digits than its factorization.

149857320722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18938 (or 9470 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

Multiplying 149857320722 by its sum of digits (50), we get a square (7492866036100 = 2737310²).

The spelling of 149857320722 in words is "one hundred forty-nine billion, eight hundred fifty-seven million, three hundred twenty thousand, seven hundred twenty-two".