26153456081 has 4 divisors (see below), whose sum is σ = 27691894692. Its totient is φ = 24615017472.

The previous prime is 26153456071. The next prime is 26153456083. The reversal of 26153456081 is 18065435162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12766966081 + 13386490000 = 112991^2 + 115700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26153456081 is a prime.

It is a super-2 number, since 2×26153456081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26153456083) 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 3 ways as a sum of consecutive naturals, for example, 769219280 + ... + 769219313.

It is an arithmetic number, because the mean of its divisors is an integer number (6922973673).

Almost surely, 2^26153456081 is an apocalyptic number.

It is an amenable number.

26153456081 is a deficient number, since it is larger than the sum of its proper divisors (1538438611).

26153456081 is a wasteful number, since it uses less digits than its factorization.

26153456081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538438610.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 26153456081 in words is "twenty-six billion, one hundred fifty-three million, four hundred fifty-six thousand, eighty-one".