164621662125 has 32 divisors (see below), whose sum is σ = 274002618240. Its totient is φ = 87775088000.

The previous prime is 164621662099. The next prime is 164621662159. The reversal of 164621662125 is 521266126461.

It is not a de Polignac number, because 164621662125 - 2¹⁸ = 164621399981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1417510 + ... + 1529240.

It is an arithmetic number, because the mean of its divisors is an integer number (8562581820).

Almost surely, 2^164621662125 is an apocalyptic number.

164621662125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164621662125 is a deficient number, since it is larger than the sum of its proper divisors (109380956115).

164621662125 is a wasteful number, since it uses less digits than its factorization.

164621662125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115678 (or 115668 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

Adding to 164621662125 its reverse (521266126461), we get a palindrome (685887788586).

The spelling of 164621662125 in words is "one hundred sixty-four billion, six hundred twenty-one million, six hundred sixty-two thousand, one hundred twenty-five".