2164506772 has 6 divisors (see below), whose sum is σ = 3787886858. Its totient is φ = 1082253384.

The previous prime is 2164506767. The next prime is 2164506779. The reversal of 2164506772 is 2776054612.

It can be written as a sum of positive squares in only one way, i.e., 1539306756 + 625200016 = 39234^2 + 25004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164506779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270563343 + ... + 270563350.

Almost surely, 2^2164506772 is an apocalyptic number.

It is an amenable number.

2164506772 is a deficient number, since it is larger than the sum of its proper divisors (1623380086).

2164506772 is a wasteful number, since it uses less digits than its factorization.

2164506772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541126697 (or 541126695 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 2164506772 is about 46524.2600371032. The cubic root of 2164506772 is about 1293.5592215067.

The spelling of 2164506772 in words is "two billion, one hundred sixty-four million, five hundred six thousand, seven hundred seventy-two".