22123402379557 has 2 divisors, whose sum is σ = 22123402379558. Its totient is φ = 22123402379556.

The previous prime is 22123402379459. The next prime is 22123402379597. The reversal of 22123402379557 is 75597320432122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21703914292516 + 419488087041 = 4658746^2 + 647679^2 .

It is a cyclic number.

It is not a de Polignac number, because 22123402379557 - 2¹¹ = 22123402377509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22123402379597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061701189778 + 11061701189779.

It is an arithmetic number, because the mean of its divisors is an integer number (11061701189779).

Almost surely, 2^{22123402379557} is an apocalyptic number.

It is an amenable number.

22123402379557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22123402379557 is an equidigital number, since it uses as much as digits as its factorization.

22123402379557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 22123402379557 in words is "twenty-two trillion, one hundred twenty-three billion, four hundred two million, three hundred seventy-nine thousand, five hundred fifty-seven".