2261608772 has 6 divisors (see below), whose sum is σ = 3957815358. Its totient is φ = 1130804384.

The previous prime is 2261608729. The next prime is 2261608807. The reversal of 2261608772 is 2778061622.

It can be written as a sum of positive squares in only one way, i.e., 1938112576 + 323496196 = 44024^2 + 17986^2 .

It is a super-3 number, since 3×2261608772³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282701093 + ... + 282701100.

It is an arithmetic number, because the mean of its divisors is an integer number (659635893).

Almost surely, 2^2261608772 is an apocalyptic number.

It is an amenable number.

2261608772 is a deficient number, since it is larger than the sum of its proper divisors (1696206586).

2261608772 is a wasteful number, since it uses less digits than its factorization.

2261608772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565402197 (or 565402195 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 2261608772 is about 47556.3746725925. The cubic root of 2261608772 is about 1312.6204316037.

The spelling of 2261608772 in words is "two billion, two hundred sixty-one million, six hundred eight thousand, seven hundred seventy-two".