22776020161 has 2 divisors, whose sum is σ = 22776020162. Its totient is φ = 22776020160.

The previous prime is 22776020159. The next prime is 22776020269. The reversal of 22776020161 is 16102067722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15366081600 + 7409938561 = 123960^2 + 86081^2 .

It is a cyclic number.

It is not a de Polignac number, because 22776020161 - 2¹ = 22776020159 is a prime.

Together with 22776020159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22776027161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11388010080 + 11388010081.

It is an arithmetic number, because the mean of its divisors is an integer number (11388010081).

Almost surely, 2^22776020161 is an apocalyptic number.

It is an amenable number.

22776020161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22776020161 is an equidigital number, since it uses as much as digits as its factorization.

22776020161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

Adding to 22776020161 its reverse (16102067722), we get a palindrome (38878087883).

The spelling of 22776020161 in words is "twenty-two billion, seven hundred seventy-six million, twenty thousand, one hundred sixty-one".