26191966368 has 192 divisors, whose sum is σ = 74990095488. Its totient is φ = 7971962880.

The previous prime is 26191966349. The next prime is 26191966387. The reversal of 26191966368 is 86366919162.

It is an interprime number because it is at equal distance from previous prime (26191966349) and next prime (26191966387).

It is a super-2 number, since 2×26191966368² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13180671 + ... + 13182657.

It is an arithmetic number, because the mean of its divisors is an integer number (390573414).

Almost surely, 2^26191966368 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 26191966368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37495047744).

26191966368 is an abundant number, since it is smaller than the sum of its proper divisors (48798129120).

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

26191966368 is a wasteful number, since it uses less digits than its factorization.

26191966368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255 (or 2247 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 57.

The spelling of 26191966368 in words is "twenty-six billion, one hundred ninety-one million, nine hundred sixty-six thousand, three hundred sixty-eight".