156456789 has 8 divisors (see below), whose sum is σ = 209858880. Its totient is φ = 103679616.

The previous prime is 156456767. The next prime is 156456793. The reversal of 156456789 is 987654651.

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

It is not a de Polignac number, because 156456789 - 2¹⁷ = 156325717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156456719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155644 + ... + 156645.

It is an arithmetic number, because the mean of its divisors is an integer number (26232360).

Almost surely, 2^156456789 is an apocalyptic number.

It is an amenable number.

156456789 is a deficient number, since it is larger than the sum of its proper divisors (53402091).

156456789 is a wasteful number, since it uses less digits than its factorization.

156456789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312459.

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

The square root of 156456789 is about 12508.2688250613. The cubic root of 156456789 is about 538.8461749087.

The spelling of 156456789 in words is "one hundred fifty-six million, four hundred fifty-six thousand, seven hundred eighty-nine".