26494402560 has 256 divisors, whose sum is σ = 89274398400. Its totient is φ = 6690963456.

The previous prime is 26494402553. The next prime is 26494402567. The reversal of 26494402560 is 6520449462.

It is an interprime number because it is at equal distance from previous prime (26494402553) and next prime (26494402567).

It is a tau number, because it is divible by the number of its divisors (256).

It is a super-2 number, since 2×26494402560² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26494402567) 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, 9337462 + ... + 9340298.

Almost surely, 2^26494402560 is an apocalyptic number.

26494402560 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 26494402560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44637199200).

26494402560 is an abundant number, since it is smaller than the sum of its proper divisors (62779995840).

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

26494402560 is an equidigital number, since it uses as much as digits as its factorization.

26494402560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894 (or 2866 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 26494402560 in words is "twenty-six billion, four hundred ninety-four million, four hundred two thousand, five hundred sixty".