1612772161 has 16 divisors (see below), whose sum is σ = 2165401728. Its totient is φ = 1160035200.

The previous prime is 1612772071. The next prime is 1612772173.

1612772161 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1612772161 - 2²⁵ = 1579217729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1612772191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804580 + ... + 806581.

It is an arithmetic number, because the mean of its divisors is an integer number (135337608).

Almost surely, 2^1612772161 is an apocalyptic number.

1612772161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1612772161 is a deficient number, since it is larger than the sum of its proper divisors (552629567).

1612772161 is a wasteful number, since it uses less digits than its factorization.

1612772161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611192.

The product of its digits is 7056, while the sum is 34.

The square root of 1612772161 is about 40159.3346682935. The cubic root of 1612772161 is about 1172.7110195253.

It can be divided in two parts, 16127 and 72161, that added together give a palindrome (88288).

The spelling of 1612772161 in words is "one billion, six hundred twelve million, seven hundred seventy-two thousand, one hundred sixty-one".