415540423261 has 2 divisors, whose sum is σ = 415540423262. Its totient is φ = 415540423260.

The previous prime is 415540423187. The next prime is 415540423279. The reversal of 415540423261 is 162324045514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400119502500 + 15420920761 = 632550^2 + 124181^2 .

It is a cyclic number.

It is not a de Polignac number, because 415540423261 - 2⁹ = 415540422749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 415540423261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (415540424261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207770211630 + 207770211631.

It is an arithmetic number, because the mean of its divisors is an integer number (207770211631).

Almost surely, 2^415540423261 is an apocalyptic number.

It is an amenable number.

415540423261 is a deficient number, since it is larger than the sum of its proper divisors (1).

415540423261 is an equidigital number, since it uses as much as digits as its factorization.

415540423261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 415540423261 its reverse (162324045514), we get a palindrome (577864468775).

The spelling of 415540423261 in words is "four hundred fifteen billion, five hundred forty million, four hundred twenty-three thousand, two hundred sixty-one".