149768644 has 27 divisors (see below), whose sum is σ = 272737101. Its totient is φ = 71959440.

The previous prime is 149768627. The next prime is 149768653. The reversal of 149768644 is 446867941.

The square root of 149768644 is 12238.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 78535044 + 71233600 = 8862^2 + 8440^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 709699 + ... + 709909.

Almost surely, 2^149768644 is an apocalyptic number.

149768644 is the 12238-th square number.

It is an amenable number.

149768644 is a deficient number, since it is larger than the sum of its proper divisors (122968457).

149768644 is an equidigital number, since it uses as much as digits as its factorization.

149768644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 242 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The cubic root of 149768644 is about 531.0559746545.

Multiplying 149768644 by its sum of digits (49), we get a square (7338663556 = 85666²).

The spelling of 149768644 in words is "one hundred forty-nine million, seven hundred sixty-eight thousand, six hundred forty-four".