156689449 has 8 divisors (see below), whose sum is σ = 179207168. Its totient is φ = 134205120.

The previous prime is 156689417. The next prime is 156689479. The reversal of 156689449 is 944986651.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 156689449 - 2⁵ = 156689417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156689396 and 156689405.

It is not an unprimeable number, because it can be changed into a prime (156689479) 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 7 ways as a sum of consecutive naturals, for example, 2689 + ... + 17905.

It is an arithmetic number, because the mean of its divisors is an integer number (22400896).

Almost surely, 2^156689449 is an apocalyptic number.

It is an amenable number.

156689449 is a deficient number, since it is larger than the sum of its proper divisors (22517719).

156689449 is a wasteful number, since it uses less digits than its factorization.

156689449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16695.

The product of its digits is 1866240, while the sum is 52.

The square root of 156689449 is about 12517.5656179626. The cubic root of 156689449 is about 539.1131407593.

The spelling of 156689449 in words is "one hundred fifty-six million, six hundred eighty-nine thousand, four hundred forty-nine".