168520385 has 16 divisors (see below), whose sum is σ = 226573632. Its totient is φ = 119246400.

The previous prime is 168520361. The next prime is 168520409. The reversal of 168520385 is 583025861.

It is an interprime number because it is at equal distance from previous prime (168520361) and next prime (168520409).

It is not a de Polignac number, because 168520385 - 2¹⁶ = 168454849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39371 + ... + 43440.

It is an arithmetic number, because the mean of its divisors is an integer number (14160852).

Almost surely, 2^168520385 is an apocalyptic number.

It is an amenable number.

168520385 is a deficient number, since it is larger than the sum of its proper divisors (58053247).

168520385 is a wasteful number, since it uses less digits than its factorization.

168520385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82864.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 168520385 is about 12981.5401628620. The cubic root of 168520385 is about 552.3539713579.

The spelling of 168520385 in words is "one hundred sixty-eight million, five hundred twenty thousand, three hundred eighty-five".