26885636017878 has 64 divisors (see below), whose sum is σ = 60248421573120. Its totient is φ = 7926513811200.

The previous prime is 26885636017871. The next prime is 26885636017931. The reversal of 26885636017878 is 87871063658862.

It is a super-2 number, since 2×26885636017878² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26885636017871) 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, 43475583 + ... + 44089653.

It is an arithmetic number, because the mean of its divisors is an integer number (941381587080).

Almost surely, 2^{26885636017878} is an apocalyptic number.

26885636017878 is an abundant number, since it is smaller than the sum of its proper divisors (33362785555242).

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

26885636017878 is a wasteful number, since it uses less digits than its factorization.

26885636017878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632053.

The product of its (nonzero) digits is 1300561920, while the sum is 75.

The spelling of 26885636017878 in words is "twenty-six trillion, eight hundred eighty-five billion, six hundred thirty-six million, seventeen thousand, eight hundred seventy-eight".