68925409165 has 16 divisors (see below), whose sum is σ = 83258270640. Its totient is φ = 54775319040.

The previous prime is 68925409153. The next prime is 68925409169. The reversal of 68925409165 is 56190452986.

It can be written as a sum of positive squares in 8 ways, for example, as 546297129 + 68379112036 = 23373^2 + 261494^2 .

It is not a de Polignac number, because 68925409165 - 2²¹ = 68923312013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68925409169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4064905 + ... + 4081825.

It is an arithmetic number, because the mean of its divisors is an integer number (5203641915).

Almost surely, 2^68925409165 is an apocalyptic number.

It is an amenable number.

68925409165 is a deficient number, since it is larger than the sum of its proper divisors (14332861475).

68925409165 is a wasteful number, since it uses less digits than its factorization.

68925409165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22272.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 68925409165 in words is "sixty-eight billion, nine hundred twenty-five million, four hundred nine thousand, one hundred sixty-five".