26622539381 has 2 divisors, whose sum is σ = 26622539382. Its totient is φ = 26622539380.

The previous prime is 26622539357. The next prime is 26622539387. The reversal of 26622539381 is 18393522662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14498327281 + 12124212100 = 120409^2 + 110110^2 .

It is a cyclic number.

It is not a de Polignac number, because 26622539381 - 2¹⁸ = 26622277237 is a prime.

It is a super-2 number, since 2×26622539381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26622539387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13311269690 + 13311269691.

It is an arithmetic number, because the mean of its divisors is an integer number (13311269691).

Almost surely, 2^26622539381 is an apocalyptic number.

It is an amenable number.

26622539381 is a deficient number, since it is larger than the sum of its proper divisors (1).

26622539381 is an equidigital number, since it uses as much as digits as its factorization.

26622539381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 47.

The spelling of 26622539381 in words is "twenty-six billion, six hundred twenty-two million, five hundred thirty-nine thousand, three hundred eighty-one".