26490719521 has 12 divisors (see below), whose sum is σ = 31000269888. Its totient is φ = 22570357992.

The previous prime is 26490719483. The next prime is 26490719527. The reversal of 26490719521 is 12591709462.

It is not a de Polignac number, because 26490719521 - 2²⁵ = 26457165089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26490719527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1610461 + ... + 1626826.

It is an arithmetic number, because the mean of its divisors is an integer number (2583355824).

Almost surely, 2^26490719521 is an apocalyptic number.

It is an amenable number.

26490719521 is a deficient number, since it is larger than the sum of its proper divisors (4509550367).

26490719521 is a wasteful number, since it uses less digits than its factorization.

26490719521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237468 (or 3237461 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 26490719521 in words is "twenty-six billion, four hundred ninety million, seven hundred nineteen thousand, five hundred twenty-one".