26780458738 has 32 divisors (see below), whose sum is σ = 45253264320. Its totient is φ = 11780717760.

The previous prime is 26780458729. The next prime is 26780458753. The reversal of 26780458738 is 83785408762.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26745 + ... + 232972.

It is an arithmetic number, because the mean of its divisors is an integer number (1414164510).

Almost surely, 2^26780458738 is an apocalyptic number.

26780458738 is a deficient number, since it is larger than the sum of its proper divisors (18472805582).

26780458738 is a wasteful number, since it uses less digits than its factorization.

26780458738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259882.

The product of its (nonzero) digits is 18063360, while the sum is 58.

The spelling of 26780458738 in words is "twenty-six billion, seven hundred eighty million, four hundred fifty-eight thousand, seven hundred thirty-eight".