26290813521 has 8 divisors (see below), whose sum is σ = 40062192064. Its totient is φ = 15023322000.

The previous prime is 26290813519. The next prime is 26290813541. The reversal of 26290813521 is 12531809262.

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

It is not a de Polignac number, because 26290813521 - 2¹ = 26290813519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26290813521.

It is not an unprimeable number, because it can be changed into a prime (26290813541) 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 7 ways as a sum of consecutive naturals, for example, 625971730 + ... + 625971771.

It is an arithmetic number, because the mean of its divisors is an integer number (5007774008).

Almost surely, 2^26290813521 is an apocalyptic number.

26290813521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26290813521 is a deficient number, since it is larger than the sum of its proper divisors (13771378543).

26290813521 is a wasteful number, since it uses less digits than its factorization.

26290813521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251943511.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 26290813521 in words is "twenty-six billion, two hundred ninety million, eight hundred thirteen thousand, five hundred twenty-one".