26249299128 has 384 divisors, whose sum is σ = 82670918400. Its totient is φ = 7668587520.

The previous prime is 26249299103. The next prime is 26249299147. The reversal of 26249299128 is 82199294262.

It is a happy number.

26249299128 is a `hidden beast` number, since 2 + 62 + 492 + 9 + 91 + 2 + 8 = 666.

It is a super-2 number, since 2×26249299128² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

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, 316256575 + ... + 316256657.

It is an arithmetic number, because the mean of its divisors is an integer number (215288850).

Almost surely, 2^26249299128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26249299128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41335459200).

26249299128 is an abundant number, since it is smaller than the sum of its proper divisors (56421619272).

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

26249299128 is a wasteful number, since it uses less digits than its factorization.

26249299128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 209 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 26249299128 in words is "twenty-six billion, two hundred forty-nine million, two hundred ninety-nine thousand, one hundred twenty-eight".