26016781 has 16 divisors (see below), whose sum is σ = 30993408. Its totient is φ = 21369600.

The previous prime is 26016779. The next prime is 26016791. The reversal of 26016781 is 18761062.

It is not a de Polignac number, because 26016781 - 2¹ = 26016779 is a prime.

It is a super-2 number, since 2×26016781² = 1353745787203922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26016721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23991 + ... + 25051.

It is an arithmetic number, because the mean of its divisors is an integer number (1937088).

Almost surely, 2^26016781 is an apocalyptic number.

It is an amenable number.

26016781 is a deficient number, since it is larger than the sum of its proper divisors (4976627).

26016781 is a wasteful number, since it uses less digits than its factorization.

26016781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 26016781 is about 5100.6647605974. The cubic root of 26016781 is about 296.3133285778.

The spelling of 26016781 in words is "twenty-six million, sixteen thousand, seven hundred eighty-one".