26290146065 has 8 divisors (see below), whose sum is σ = 31665456360. Its totient is φ = 20953929472.

The previous prime is 26290146059. The next prime is 26290146079. The reversal of 26290146065 is 56064109262.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6927424 + 26283218641 = 2632^2 + 162121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26290146065 - 2¹⁰ = 26290145041 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9771944 + ... + 9774633.

It is an arithmetic number, because the mean of its divisors is an integer number (3958182045).

Almost surely, 2^26290146065 is an apocalyptic number.

It is an amenable number.

26290146065 is a deficient number, since it is larger than the sum of its proper divisors (5375310295).

26290146065 is a wasteful number, since it uses less digits than its factorization.

26290146065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19546851.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 26290146065 in words is "twenty-six billion, two hundred ninety million, one hundred forty-six thousand, sixty-five".