149181471928 has 16 divisors (see below), whose sum is σ = 279999827280. Its totient is φ = 74514851328.

The previous prime is 149181471899. The next prime is 149181471949. The reversal of 149181471928 is 829174181941.

It is a happy number.

It is a super-2 number, since 2×149181471928² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9477225 + ... + 9492952.

It is an arithmetic number, because the mean of its divisors is an integer number (17499989205).

Almost surely, 2^149181471928 is an apocalyptic number.

It is an amenable number.

149181471928 is a deficient number, since it is larger than the sum of its proper divisors (130818355352).

149181471928 is a wasteful number, since it uses less digits than its factorization.

149181471928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18971166 (or 18971162 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 55.

The spelling of 149181471928 in words is "one hundred forty-nine billion, one hundred eighty-one million, four hundred seventy-one thousand, nine hundred twenty-eight".