22478731361 has 2 divisors, whose sum is σ = 22478731362. Its totient is φ = 22478731360.

The previous prime is 22478731357. The next prime is 22478731391. The reversal of 22478731361 is 16313787422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18474246400 + 4004484961 = 135920^2 + 63281^2 .

It is a cyclic number.

It is not a de Polignac number, because 22478731361 - 2² = 22478731357 is a prime.

It is not a weakly prime, because it can be changed into another prime (22478731391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11239365680 + 11239365681.

It is an arithmetic number, because the mean of its divisors is an integer number (11239365681).

Almost surely, 2^22478731361 is an apocalyptic number.

It is an amenable number.

22478731361 is a deficient number, since it is larger than the sum of its proper divisors (1).

22478731361 is an equidigital number, since it uses as much as digits as its factorization.

22478731361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The spelling of 22478731361 in words is "twenty-two billion, four hundred seventy-eight million, seven hundred thirty-one thousand, three hundred sixty-one".