26489381642 has 16 divisors (see below), whose sum is σ = 41230577664. Its totient is φ = 12750330000.

The previous prime is 26489381641. The next prime is 26489381647. The reversal of 26489381642 is 24618398462.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26489381641) 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 7 ways as a sum of consecutive naturals, for example, 1106609 + ... + 1130292.

It is an arithmetic number, because the mean of its divisors is an integer number (2576911104).

Almost surely, 2^26489381642 is an apocalyptic number.

26489381642 is a deficient number, since it is larger than the sum of its proper divisors (14741196022).

26489381642 is a wasteful number, since it uses less digits than its factorization.

26489381642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237125.

The product of its digits is 3981312, while the sum is 53.

The spelling of 26489381642 in words is "twenty-six billion, four hundred eighty-nine million, three hundred eighty-one thousand, six hundred forty-two".