26131479768 has 128 divisors (see below), whose sum is σ = 73194840000. Its totient is φ = 8637889536.

The previous prime is 26131479743. The next prime is 26131479769. The reversal of 26131479768 is 86797413162.

26131479768 is a `hidden beast` number, since 2 + 613 + 14 + 7 + 9 + 7 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26131479769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21261778 + ... + 21263006.

Almost surely, 2^26131479768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26131479768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36597420000).

26131479768 is an abundant number, since it is smaller than the sum of its proper divisors (47063360232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26131479768 is a wasteful number, since it uses less digits than its factorization.

26131479768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1976 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 26131479768 in words is "twenty-six billion, one hundred thirty-one million, four hundred seventy-nine thousand, seven hundred sixty-eight".