156645871 has 8 divisors (see below), whose sum is σ = 169906464. Its totient is φ = 143834880.

The previous prime is 156645857. The next prime is 156645887. The reversal of 156645871 is 178546651.

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

It is a cyclic number.

It is not a de Polignac number, because 156645871 - 2²⁵ = 123091439 is a prime.

It is a super-3 number, since 3×156645871³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156640871) 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 7 ways as a sum of consecutive naturals, for example, 111675 + ... + 113068.

It is an arithmetic number, because the mean of its divisors is an integer number (21238308).

Almost surely, 2^156645871 is an apocalyptic number.

156645871 is a deficient number, since it is larger than the sum of its proper divisors (13260593).

156645871 is a wasteful number, since it uses less digits than its factorization.

156645871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224801.

The product of its digits is 201600, while the sum is 43.

The square root of 156645871 is about 12515.8248229991. The cubic root of 156645871 is about 539.0631572816.

The spelling of 156645871 in words is "one hundred fifty-six million, six hundred forty-five thousand, eight hundred seventy-one".