21622361567 has 2 divisors, whose sum is σ = 21622361568. Its totient is φ = 21622361566.

The previous prime is 21622361533. The next prime is 21622361669. The reversal of 21622361567 is 76516322612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21622361567 - 2¹⁸ = 21622099423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21622360567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10811180783 + 10811180784.

It is an arithmetic number, because the mean of its divisors is an integer number (10811180784).

Almost surely, 2^21622361567 is an apocalyptic number.

21622361567 is a deficient number, since it is larger than the sum of its proper divisors (1).

21622361567 is an equidigital number, since it uses as much as digits as its factorization.

21622361567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The spelling of 21622361567 in words is "twenty-one billion, six hundred twenty-two million, three hundred sixty-one thousand, five hundred sixty-seven".