149856657 has 16 divisors (see below), whose sum is σ = 203099520. Its totient is φ = 98272512.

The previous prime is 149856643. The next prime is 149856673. The reversal of 149856657 is 756658941.

It is not a de Polignac number, because 149856657 - 2¹⁰ = 149855633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149856557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46969 + ... + 50057.

It is an arithmetic number, because the mean of its divisors is an integer number (12693720).

Almost surely, 2^149856657 is an apocalyptic number.

It is an amenable number.

149856657 is a deficient number, since it is larger than the sum of its proper divisors (53242863).

149856657 is a wasteful number, since it uses less digits than its factorization.

149856657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352.

The product of its digits is 1814400, while the sum is 51.

The square root of 149856657 is about 12241.5953617165. The cubic root of 149856657 is about 531.1599810196.

The spelling of 149856657 in words is "one hundred forty-nine million, eight hundred fifty-six thousand, six hundred fifty-seven".