164977689689538 has 32 divisors (see below), whose sum is σ = 359952179164992. Its totient is φ = 49993120382400.

The previous prime is 164977689689509. The next prime is 164977689689539. The reversal of 164977689689538 is 835986986779461.

It is not an unprimeable number, because it can be changed into a prime (164977689689539) 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, 27301920 + ... + 32792532.

It is an arithmetic number, because the mean of its divisors is an integer number (11248505598906).

Almost surely, 2^{164977689689538} is an apocalyptic number.

164977689689538 is an abundant number, since it is smaller than the sum of its proper divisors (194974489475454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164977689689538 is a wasteful number, since it uses less digits than its factorization.

164977689689538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945890.

The product of its digits is 237027409920, while the sum is 96.

The spelling of 164977689689538 in words is "one hundred sixty-four trillion, nine hundred seventy-seven billion, six hundred eighty-nine million, six hundred eighty-nine thousand, five hundred thirty-eight".