26631175770421 has 2 divisors, whose sum is σ = 26631175770422. Its totient is φ = 26631175770420.

The previous prime is 26631175770389. The next prime is 26631175770439. The reversal of 26631175770421 is 12407757113662.

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., 26415889050321 + 215286720100 = 5139639^2 + 463990^2 .

It is a cyclic number.

It is not a de Polignac number, because 26631175770421 - 2⁵ = 26631175770389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26631175710421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13315587885210 + 13315587885211.

It is an arithmetic number, because the mean of its divisors is an integer number (13315587885211).

Almost surely, 2^{26631175770421} is an apocalyptic number.

It is an amenable number.

26631175770421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26631175770421 is an equidigital number, since it uses as much as digits as its factorization.

26631175770421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 26631175770421 in words is "twenty-six trillion, six hundred thirty-one billion, one hundred seventy-five million, seven hundred seventy thousand, four hundred twenty-one".