26458318421 has 2 divisors, whose sum is σ = 26458318422. Its totient is φ = 26458318420.

The previous prime is 26458318391. The next prime is 26458318427. The reversal of 26458318421 is 12481385462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14073076900 + 12385241521 = 118630^2 + 111289^2 .

It is a cyclic number.

It is not a de Polignac number, because 26458318421 - 2¹⁰ = 26458317397 is a prime.

It is a super-2 number, since 2×26458318421² (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 (26458318427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13229159210 + 13229159211.

It is an arithmetic number, because the mean of its divisors is an integer number (13229159211).

Almost surely, 2^26458318421 is an apocalyptic number.

It is an amenable number.

26458318421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26458318421 is an equidigital number, since it uses as much as digits as its factorization.

26458318421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 44.

The spelling of 26458318421 in words is "twenty-six billion, four hundred fifty-eight million, three hundred eighteen thousand, four hundred twenty-one".