26178449280 has 384 divisors, whose sum is σ = 88978435200. Its totient is φ = 6545387520.

The previous prime is 26178449257. The next prime is 26178449293. The reversal of 26178449280 is 8294487162.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×26178449280² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124068375 + ... + 124068585.

It is an arithmetic number, because the mean of its divisors is an integer number (231714675).

Almost surely, 2^26178449280 is an apocalyptic number.

26178449280 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 26178449280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44489217600).

26178449280 is an abundant number, since it is smaller than the sum of its proper divisors (62799985920).

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

26178449280 is a wasteful number, since it uses less digits than its factorization.

26178449280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 26178449280 in words is "twenty-six billion, one hundred seventy-eight million, four hundred forty-nine thousand, two hundred eighty".