156640065 has 8 divisors (see below), whose sum is σ = 250624128. Its totient is φ = 83541360.

The previous prime is 156640063. The next prime is 156640087. The reversal of 156640065 is 560046651.

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

It is not a de Polignac number, because 156640065 - 2¹ = 156640063 is a prime.

It is a super-2 number, since 2×156640065² = 49072219926408450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (156640061) 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 7 ways as a sum of consecutive naturals, for example, 5221321 + ... + 5221350.

It is an arithmetic number, because the mean of its divisors is an integer number (31328016).

Almost surely, 2^156640065 is an apocalyptic number.

156640065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

156640065 is a deficient number, since it is larger than the sum of its proper divisors (93984063).

156640065 is a wasteful number, since it uses less digits than its factorization.

156640065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10442679.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 156640065 is about 12515.5928744906. The cubic root of 156640065 is about 539.0564971648.

The spelling of 156640065 in words is "one hundred fifty-six million, six hundred forty thousand, sixty-five".