26012781801 has 32 divisors (see below), whose sum is σ = 41079296000. Its totient is φ = 16221136464.

The previous prime is 26012781797. The next prime is 26012781803. The reversal of 26012781801 is 10818721062.

It is not a de Polignac number, because 26012781801 - 2² = 26012781797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26012781803) 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, 280405 + ... + 361458.

It is an arithmetic number, because the mean of its divisors is an integer number (1283728000).

Almost surely, 2^26012781801 is an apocalyptic number.

It is an amenable number.

26012781801 is a deficient number, since it is larger than the sum of its proper divisors (15066514199).

26012781801 is a wasteful number, since it uses less digits than its factorization.

26012781801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641970 (or 641964 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 26012781801 in words is "twenty-six billion, twelve million, seven hundred eighty-one thousand, eight hundred one".