26487438765 has 32 divisors (see below), whose sum is σ = 43054072320. Its totient is φ = 13903059456.

The previous prime is 26487438749. The next prime is 26487438767. The reversal of 26487438765 is 56783478462.

It is a happy number.

It is not a de Polignac number, because 26487438765 - 2⁴ = 26487438749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26487438699 and 26487438708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26487438767) 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 31 ways as a sum of consecutive naturals, for example, 335199 + ... + 406611.

It is an arithmetic number, because the mean of its divisors is an integer number (1345439760).

Almost surely, 2^26487438765 is an apocalyptic number.

It is an amenable number.

26487438765 is a deficient number, since it is larger than the sum of its proper divisors (16566633555).

26487438765 is a wasteful number, since it uses less digits than its factorization.

26487438765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71813.

The product of its digits is 54190080, while the sum is 60.

The spelling of 26487438765 in words is "twenty-six billion, four hundred eighty-seven million, four hundred thirty-eight thousand, seven hundred sixty-five".