149768645 has 18 divisors (see below), whose sum is σ = 195073974. Its totient is φ = 110335680.

The previous prime is 149768627. The next prime is 149768653. The reversal of 149768645 is 546867941.

149768645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 12238²+1.

It can be written as a sum of positive squares in 9 ways, for example, as 149768644 + 1 = 12238^2 + 1^2 .

It is not a de Polignac number, because 149768645 - 2⁸ = 149768389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149768593 and 149768602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 355535 + ... + 355955.

It is an arithmetic number, because the mean of its divisors is an integer number (10837443).

Almost surely, 2^149768645 is an apocalyptic number.

It is an amenable number.

149768645 is a deficient number, since it is larger than the sum of its proper divisors (45305329).

149768645 is an frugal number, since it uses more digits than its factorization.

149768645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 439 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 149768645 is about 12238.0000408563. Note that the first 4 decimals coincide. The cubic root of 149768645 is about 531.0559758365.

The spelling of 149768645 in words is "one hundred forty-nine million, seven hundred sixty-eight thousand, six hundred forty-five".