149568811 has 4 divisors (see below), whose sum is σ = 170935792. Its totient is φ = 128201832.

The previous prime is 149568673. The next prime is 149568823. The reversal of 149568811 is 118865941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118865941 = 37 ⋅3212593.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149568811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149568841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10683480 + ... + 10683493.

It is an arithmetic number, because the mean of its divisors is an integer number (42733948).

Almost surely, 2^149568811 is an apocalyptic number.

149568811 is a deficient number, since it is larger than the sum of its proper divisors (21366981).

149568811 is an equidigital number, since it uses as much as digits as its factorization.

149568811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21366980.

The product of its digits is 69120, while the sum is 43.

The square root of 149568811 is about 12229.8328279662. The cubic root of 149568811 is about 530.8196774347.

The spelling of 149568811 in words is "one hundred forty-nine million, five hundred sixty-eight thousand, eight hundred eleven".