42722688990881 has 2 divisors, whose sum is σ = 42722688990882. Its totient is φ = 42722688990880.

The previous prime is 42722688990859. The next prime is 42722688990941. The reversal of 42722688990881 is 18809988622724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38998526214400 + 3724162776481 = 6244880^2 + 1929809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42722688990881 is a prime.

It is a super-2 number, since 2×42722688990881² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42722688990799 and 42722688990808.

It is not a weakly prime, because it can be changed into another prime (42722688990811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21361344495440 + 21361344495441.

It is an arithmetic number, because the mean of its divisors is an integer number (21361344495441).

Almost surely, 2^{42722688990881} is an apocalyptic number.

It is an amenable number.

42722688990881 is a deficient number, since it is larger than the sum of its proper divisors (1).

42722688990881 is an equidigital number, since it uses as much as digits as its factorization.

42722688990881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 445906944, while the sum is 74.

The spelling of 42722688990881 in words is "forty-two trillion, seven hundred twenty-two billion, six hundred eighty-eight million, nine hundred ninety thousand, eight hundred eighty-one".