164125777772 has 24 divisors (see below), whose sum is σ = 331762268880. Its totient is φ = 70214236160.

The previous prime is 164125777727. The next prime is 164125777787. The reversal of 164125777772 is 277777521461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109708997 + ... + 109710492.

It is an arithmetic number, because the mean of its divisors is an integer number (13823427870).

Almost surely, 2^164125777772 is an apocalyptic number.

It is an amenable number.

164125777772 is an abundant number, since it is smaller than the sum of its proper divisors (167636491108).

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

164125777772 is a wasteful number, since it uses less digits than its factorization.

164125777772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219419521 (or 219419519 counting only the distinct ones).

The product of its digits is 8067360, while the sum is 56.

The spelling of 164125777772 in words is "one hundred sixty-four billion, one hundred twenty-five million, seven hundred seventy-seven thousand, seven hundred seventy-two".