26278193131 has 8 divisors (see below), whose sum is σ = 26347411328. Its totient is φ = 26209008000.

The previous prime is 26278193087. The next prime is 26278193147. The reversal of 26278193131 is 13139187262.

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

It is a 7-Lehmer number, since φ(26278193131) divides (26278193131-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 26278193131 - 2¹¹ = 26278191083 is a prime.

It is a super-2 number, since 2×26278193131² (a number of 22 digits) contains 22 as substring.

It is the 162106-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26278193531) by changing a digit.

It is a nontrivial repunit in base 162105.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2723686 + ... + 2733316.

It is an arithmetic number, because the mean of its divisors is an integer number (3293426416).

Almost surely, 2^26278193131 is an apocalyptic number.

26278193131 is a deficient number, since it is larger than the sum of its proper divisors (69218197).

26278193131 is an equidigital number, since it uses as much as digits as its factorization.

26278193131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16533.

The product of its digits is 108864, while the sum is 43.

The spelling of 26278193131 in words is "twenty-six billion, two hundred seventy-eight million, one hundred ninety-three thousand, one hundred thirty-one".