26378876505 has 32 divisors (see below), whose sum is σ = 42605823744. Its totient is φ = 13935681536.

The previous prime is 26378876501. The next prime is 26378876509. The reversal of 26378876505 is 50567887362.

It is an interprime number because it is at equal distance from previous prime (26378876501) and next prime (26378876509).

It is a cyclic number.

It is not a de Polignac number, because 26378876505 - 2² = 26378876501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26378876501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3533737 + ... + 3541193.

It is an arithmetic number, because the mean of its divisors is an integer number (1331431992).

Almost surely, 2^26378876505 is an apocalyptic number.

It is an amenable number.

26378876505 is a deficient number, since it is larger than the sum of its proper divisors (16226947239).

26378876505 is a wasteful number, since it uses less digits than its factorization.

26378876505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9665.

The product of its (nonzero) digits is 16934400, while the sum is 57.

The spelling of 26378876505 in words is "twenty-six billion, three hundred seventy-eight million, eight hundred seventy-six thousand, five hundred five".