149686721111 has 16 divisors (see below), whose sum is σ = 151721856000. Its totient is φ = 147663972000.

The previous prime is 149686721083. The next prime is 149686721143. The reversal of 149686721111 is 111127686941.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 149686721111 - 2⁶ = 149686721047 is a prime.

It is a super-2 number, since 2×149686721111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149686721161) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31503986 + ... + 31508736.

It is an arithmetic number, because the mean of its divisors is an integer number (9482616000).

Almost surely, 2^149686721111 is an apocalyptic number.

149686721111 is a deficient number, since it is larger than the sum of its proper divisors (2035134889).

149686721111 is a wasteful number, since it uses less digits than its factorization.

149686721111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5966.

The product of its digits is 145152, while the sum is 47.

The spelling of 149686721111 in words is "one hundred forty-nine billion, six hundred eighty-six million, seven hundred twenty-one thousand, one hundred eleven".