156729489 has 24 divisors (see below), whose sum is σ = 244675008. Its totient is φ = 88976160.

The previous prime is 156729473. The next prime is 156729491. The reversal of 156729489 is 984927651.

It is not a de Polignac number, because 156729489 - 2⁴ = 156729473 is a prime.

It is a super-2 number, since 2×156729489² = 49128265444402242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156729439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19684 + ... + 26474.

It is an arithmetic number, because the mean of its divisors is an integer number (10194792).

Almost surely, 2^156729489 is an apocalyptic number.

It is an amenable number.

156729489 is a deficient number, since it is larger than the sum of its proper divisors (87945519).

156729489 is a wasteful number, since it uses less digits than its factorization.

156729489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6965 (or 6958 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 156729489 is about 12519.1648683129. The cubic root of 156729489 is about 539.1590580219.

The spelling of 156729489 in words is "one hundred fifty-six million, seven hundred twenty-nine thousand, four hundred eighty-nine".