149421186657 has 12 divisors (see below), whose sum is σ = 216926192340. Its totient is φ = 99108467808.

The previous prime is 149421186643. The next prime is 149421186661. The reversal of 149421186657 is 756681124941.

149421186657 is a `hidden beast` number, since 1 + 494 + 2 + 11 + 86 + 65 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 122721299856 + 26699886801 = 350316^2 + 163401^2 .

It is not a de Polignac number, because 149421186657 - 2¹⁴ = 149421170273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149421186617) 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 11 ways as a sum of consecutive naturals, for example, 42136182 + ... + 42139727.

It is an arithmetic number, because the mean of its divisors is an integer number (18077182695).

Almost surely, 2^149421186657 is an apocalyptic number.

It is an amenable number.

149421186657 is a deficient number, since it is larger than the sum of its proper divisors (67505005683).

149421186657 is a wasteful number, since it uses less digits than its factorization.

149421186657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84276112 (or 84276109 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 149421186657 in words is "one hundred forty-nine billion, four hundred twenty-one million, one hundred eighty-six thousand, six hundred fifty-seven".