26783972641 has 2 divisors, whose sum is σ = 26783972642. Its totient is φ = 26783972640.

The previous prime is 26783972629. The next prime is 26783972647. The reversal of 26783972641 is 14627938762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22831210000 + 3952762641 = 151100^2 + 62871^2 .

It is a cyclic number.

It is not a de Polignac number, because 26783972641 - 2¹⁵ = 26783939873 is a prime.

It is not a weakly prime, because it can be changed into another prime (26783972647) 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, 13391986320 + 13391986321.

It is an arithmetic number, because the mean of its divisors is an integer number (13391986321).

Almost surely, 2^26783972641 is an apocalyptic number.

It is an amenable number.

26783972641 is a deficient number, since it is larger than the sum of its proper divisors (1).

26783972641 is an equidigital number, since it uses as much as digits as its factorization.

26783972641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The spelling of 26783972641 in words is "twenty-six billion, seven hundred eighty-three million, nine hundred seventy-two thousand, six hundred forty-one".