21772918514959 has 2 divisors, whose sum is σ = 21772918514960. Its totient is φ = 21772918514958.

The previous prime is 21772918514933. The next prime is 21772918514969. The reversal of 21772918514959 is 95941581927712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21772918514959 - 2³⁹ = 21223162701071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21772918514969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10886459257479 + 10886459257480.

It is an arithmetic number, because the mean of its divisors is an integer number (10886459257480).

Almost surely, 2^{21772918514959} is an apocalyptic number.

21772918514959 is a deficient number, since it is larger than the sum of its proper divisors (1).

21772918514959 is an equidigital number, since it uses as much as digits as its factorization.

21772918514959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 70.

The spelling of 21772918514959 in words is "twenty-one trillion, seven hundred seventy-two billion, nine hundred eighteen million, five hundred fourteen thousand, nine hundred fifty-nine".