26491438061 has 8 divisors (see below), whose sum is σ = 29265571200. Its totient is φ = 23778275040.

The previous prime is 26491438013. The next prime is 26491438087. The reversal of 26491438061 is 16083419462.

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 26491438061 - 2¹⁸ = 26491175917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26491438361) 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 7 ways as a sum of consecutive naturals, for example, 15241616 + ... + 15243353.

It is an arithmetic number, because the mean of its divisors is an integer number (3658196400).

Almost surely, 2^26491438061 is an apocalyptic number.

It is an amenable number.

26491438061 is a deficient number, since it is larger than the sum of its proper divisors (2774133139).

26491438061 is a wasteful number, since it uses less digits than its factorization.

26491438061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30485059.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 26491438061 in words is "twenty-six billion, four hundred ninety-one million, four hundred thirty-eight thousand, sixty-one".