26519421687 has 16 divisors (see below), whose sum is σ = 38576426880. Its totient is φ = 16071242400.

The previous prime is 26519421671. The next prime is 26519421697. The reversal of 26519421687 is 78612491562.

It is not a de Polignac number, because 26519421687 - 2⁴ = 26519421671 is a prime.

It is a super-2 number, since 2×26519421687² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26519421697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 894264 + ... + 923442.

It is an arithmetic number, because the mean of its divisors is an integer number (2411026680).

Almost surely, 2^26519421687 is an apocalyptic number.

26519421687 is a deficient number, since it is larger than the sum of its proper divisors (12057005193).

26519421687 is a wasteful number, since it uses less digits than its factorization.

26519421687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56734.

The product of its digits is 1451520, while the sum is 51.

The spelling of 26519421687 in words is "twenty-six billion, five hundred nineteen million, four hundred twenty-one thousand, six hundred eighty-seven".