26815051840 has 112 divisors (see below), whose sum is σ = 66154279680. Its totient is φ = 10340628480.

The previous prime is 26815051829. The next prime is 26815051841. The reversal of 26815051840 is 4815051862.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 26815051793 and 26815051802.

It is not an unprimeable number, because it can be changed into a prime (26815051841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7635685 + ... + 7639195.

Almost surely, 2^26815051840 is an apocalyptic number.

26815051840 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 26815051840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33077139840).

26815051840 is an abundant number, since it is smaller than the sum of its proper divisors (39339227840).

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

26815051840 is a wasteful number, since it uses less digits than its factorization.

26815051840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380 (or 4370 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 26815051840 in words is "twenty-six billion, eight hundred fifteen million, fifty-one thousand, eight hundred forty".