21622677157 has 2 divisors, whose sum is σ = 21622677158. Its totient is φ = 21622677156.

The previous prime is 21622677133. The next prime is 21622677163. The reversal of 21622677157 is 75177622612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17904848481 + 3717828676 = 133809^2 + 60974^2 .

It is a cyclic number.

It is not a de Polignac number, because 21622677157 - 2¹⁵ = 21622644389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21622677187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10811338578 + 10811338579.

It is an arithmetic number, because the mean of its divisors is an integer number (10811338579).

Almost surely, 2^21622677157 is an apocalyptic number.

It is an amenable number.

21622677157 is a deficient number, since it is larger than the sum of its proper divisors (1).

21622677157 is an equidigital number, since it uses as much as digits as its factorization.

21622677157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 46.

The spelling of 21622677157 in words is "twenty-one billion, six hundred twenty-two million, six hundred seventy-seven thousand, one hundred fifty-seven".