26687195840 has 112 divisors (see below), whose sum is σ = 64453239648. Its totient is φ = 10523541504.

The previous prime is 26687195839. The next prime is 26687195861. The reversal of 26687195840 is 4859178662.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17874134 + ... + 17875626.

It is an arithmetic number, because the mean of its divisors is an integer number (575475354).

Almost surely, 2^26687195840 is an apocalyptic number.

26687195840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26687195840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32226619824).

26687195840 is an abundant number, since it is smaller than the sum of its proper divisors (37766043808).

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

26687195840 is a wasteful number, since it uses less digits than its factorization.

26687195840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266 (or 2256 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 26687195840 in words is "twenty-six billion, six hundred eighty-seven million, one hundred ninety-five thousand, eight hundred forty".