164986036678 has 4 divisors (see below), whose sum is σ = 247479055020. Its totient is φ = 82493018338.

The previous prime is 164986036669. The next prime is 164986036679. The reversal of 164986036678 is 876630689461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 876630689461 = 59 ⋅14858147279.

It is a super-2 number, since 2×164986036678² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164986036679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41246509168 + ... + 41246509171.

It is an arithmetic number, because the mean of its divisors is an integer number (61869763755).

Almost surely, 2^164986036678 is an apocalyptic number.

164986036678 is a deficient number, since it is larger than the sum of its proper divisors (82493018342).

164986036678 is an equidigital number, since it uses as much as digits as its factorization.

164986036678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82493018341.

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 164986036678 in words is "one hundred sixty-four billion, nine hundred eighty-six million, thirty-six thousand, six hundred seventy-eight".