26215639800 has 384 divisors, whose sum is σ = 96405258240. Its totient is φ = 5766796800.

The previous prime is 26215639799. The next prime is 26215639811. The reversal of 26215639800 is 893651262.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29554957 + ... + 29555843.

It is an arithmetic number, because the mean of its divisors is an integer number (251055360).

Almost surely, 2^26215639800 is an apocalyptic number.

26215639800 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 26215639800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48202629120).

26215639800 is an abundant number, since it is smaller than the sum of its proper divisors (70189618440).

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

26215639800 is a wasteful number, since it uses less digits than its factorization.

26215639800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 26215639800 in words is "twenty-six billion, two hundred fifteen million, six hundred thirty-nine thousand, eight hundred".