165777636964 has 9 divisors (see below), whose sum is σ = 290112289747. Its totient is φ = 82888411324.

The previous prime is 165777636943. The next prime is 165777637013. The reversal of 165777636964 is 469636777561.

The square root of 165777636964 is 407158.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165777636964.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 712527 + ... + 916105.

Almost surely, 2^165777636964 is an apocalyptic number.

165777636964 is the 407158-th square number.

It is an amenable number.

165777636964 is a deficient number, since it is larger than the sum of its proper divisors (124334652783).

165777636964 is an frugal number, since it uses more digits than its factorization.

165777636964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407162 (or 203581 counting only the distinct ones).

The product of its digits is 240045120, while the sum is 67.

The spelling of 165777636964 in words is "one hundred sixty-five billion, seven hundred seventy-seven million, six hundred thirty-six thousand, nine hundred sixty-four".