156720164 has 12 divisors (see below), whose sum is σ = 274672524. Its totient is φ = 78242304.

The previous prime is 156720149. The next prime is 156720173. The reversal of 156720164 is 461027651.

It can be written as a sum of positive squares in 2 ways, for example, as 75864100 + 80856064 = 8710^2 + 8992^2 .

It is a super-2 number, since 2×156720164² = 49122419608373792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 156720164.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26417 + ... + 31800.

It is an arithmetic number, because the mean of its divisors is an integer number (22889377).

Almost surely, 2^156720164 is an apocalyptic number.

It is an amenable number.

156720164 is a deficient number, since it is larger than the sum of its proper divisors (117952360).

156720164 is a wasteful number, since it uses less digits than its factorization.

156720164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58894 (or 58892 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 156720164 is about 12518.7924337773. The cubic root of 156720164 is about 539.1483649525.

The spelling of 156720164 in words is "one hundred fifty-six million, seven hundred twenty thousand, one hundred sixty-four".