26190241581 has 8 divisors (see below), whose sum is σ = 39908939584. Its totient is φ = 14965852320.

The previous prime is 26190241529. The next prime is 26190241589. The reversal of 26190241581 is 18514209162.

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

It is not a de Polignac number, because 26190241581 - 2¹³ = 26190233389 is a prime.

It is a super-2 number, since 2×26190241581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26190241589) 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, 623577160 + ... + 623577201.

It is an arithmetic number, because the mean of its divisors is an integer number (4988617448).

Almost surely, 2^26190241581 is an apocalyptic number.

26190241581 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26190241581 is a deficient number, since it is larger than the sum of its proper divisors (13718698003).

26190241581 is a wasteful number, since it uses less digits than its factorization.

26190241581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247154371.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 26190241581 in words is "twenty-six billion, one hundred ninety million, two hundred forty-one thousand, five hundred eighty-one".