4777772161 has 4 divisors (see below), whose sum is σ = 4790378800. Its totient is φ = 4765165524.

The previous prime is 4777772143. The next prime is 4777772171. The reversal of 4777772161 is 1612777774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1612777774 = 2 ⋅806388887.

It is a cyclic number.

It is not a de Polignac number, because 4777772161 - 2¹¹ = 4777770113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4777772171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6302751 + ... + 6303508.

It is an arithmetic number, because the mean of its divisors is an integer number (1197594700).

Almost surely, 2^4777772161 is an apocalyptic number.

It is an amenable number.

4777772161 is a deficient number, since it is larger than the sum of its proper divisors (12606639).

4777772161 is a wasteful number, since it uses less digits than its factorization.

4777772161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12606638.

The product of its digits is 806736, while the sum is 49.

The square root of 4777772161 is about 69121.4305479856. The cubic root of 4777772161 is about 1684.2574557287.

The spelling of 4777772161 in words is "four billion, seven hundred seventy-seven million, seven hundred seventy-two thousand, one hundred sixty-one".