26689357242 has 24 divisors (see below), whose sum is σ = 58195271316. Its totient is φ = 8839786176.

The previous prime is 26689357241. The next prime is 26689357249. The reversal of 26689357242 is 24275398662.

26689357242 is a `hidden beast` number, since 2 + 6 + 68 + 9 + 3 + 572 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21063007161 + 5626350081 = 145131^2 + 75009^2 .

It is not an unprimeable number, because it can be changed into a prime (26689357241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4719283 + ... + 4724934.

Almost surely, 2^26689357242 is an apocalyptic number.

26689357242 is an abundant number, since it is smaller than the sum of its proper divisors (31505914074).

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

26689357242 is a wasteful number, since it uses less digits than its factorization.

26689357242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9444382 (or 9444379 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 26689357242 in words is "twenty-six billion, six hundred eighty-nine million, three hundred fifty-seven thousand, two hundred forty-two".