26041615421 has 2 divisors, whose sum is σ = 26041615422. Its totient is φ = 26041615420.

The previous prime is 26041615417. The next prime is 26041615487. The reversal of 26041615421 is 12451614062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25853102521 + 188512900 = 160789^2 + 13730^2 .

It is a cyclic number.

It is not a de Polignac number, because 26041615421 - 2² = 26041615417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26041615921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13020807710 + 13020807711.

It is an arithmetic number, because the mean of its divisors is an integer number (13020807711).

Almost surely, 2^26041615421 is an apocalyptic number.

It is an amenable number.

26041615421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26041615421 is an equidigital number, since it uses as much as digits as its factorization.

26041615421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 26041615421 in words is "twenty-six billion, forty-one million, six hundred fifteen thousand, four hundred twenty-one".