68157645 has 32 divisors (see below), whose sum is σ = 111628800. Its totient is φ = 35503104.

The previous prime is 68157643. The next prime is 68157647. The reversal of 68157645 is 54675186.

It is an interprime number because it is at equal distance from previous prime (68157643) and next prime (68157647).

It is not a de Polignac number, because 68157645 - 2¹ = 68157643 is a prime.

It is a super-3 number, since 3×68157645³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68157597 and 68157606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68157643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133651 + ... + 134159.

It is an arithmetic number, because the mean of its divisors is an integer number (3488400).

Almost surely, 2^68157645 is an apocalyptic number.

It is an amenable number.

68157645 is a deficient number, since it is larger than the sum of its proper divisors (43471155).

68157645 is a wasteful number, since it uses less digits than its factorization.

68157645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its digits is 201600, while the sum is 42.

The square root of 68157645 is about 8255.7643498346. The cubic root of 68157645 is about 408.4806846611.

The spelling of 68157645 in words is "sixty-eight million, one hundred fifty-seven thousand, six hundred forty-five".