26434056521 has 8 divisors (see below), whose sum is σ = 26643274944. Its totient is φ = 26224950960.

The previous prime is 26434056503. The next prime is 26434056581. The reversal of 26434056521 is 12565043462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26434056521 - 2³⁰ = 25360314697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26434056581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477731 + ... + 530183.

It is an arithmetic number, because the mean of its divisors is an integer number (3330409368).

Almost surely, 2^26434056521 is an apocalyptic number.

It is an amenable number.

26434056521 is a deficient number, since it is larger than the sum of its proper divisors (209218423).

26434056521 is a wasteful number, since it uses less digits than its factorization.

26434056521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56431.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 26434056521 its reverse (12565043462), we get a palindrome (38999099983).

The spelling of 26434056521 in words is "twenty-six billion, four hundred thirty-four million, fifty-six thousand, five hundred twenty-one".