82425366421 has 2 divisors, whose sum is σ = 82425366422. Its totient is φ = 82425366420.

The previous prime is 82425366343. The next prime is 82425366427. The reversal of 82425366421 is 12466352428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60866317521 + 21559048900 = 246711^2 + 146830^2 .

It is a cyclic number.

It is not a de Polignac number, because 82425366421 - 2²³ = 82416977813 is a prime.

It is a super-2 number, since 2×82425366421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82425366427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41212683210 + 41212683211.

It is an arithmetic number, because the mean of its divisors is an integer number (41212683211).

Almost surely, 2^82425366421 is an apocalyptic number.

It is an amenable number.

82425366421 is a deficient number, since it is larger than the sum of its proper divisors (1).

82425366421 is an equidigital number, since it uses as much as digits as its factorization.

82425366421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 43.

The spelling of 82425366421 in words is "eighty-two billion, four hundred twenty-five million, three hundred sixty-six thousand, four hundred twenty-one".