26012661400 has 96 divisors (see below), whose sum is σ = 66079364400. Its totient is φ = 9444556800.

The previous prime is 26012661391. The next prime is 26012661421. The reversal of 26012661400 is 416621062.

It is a super-2 number, since 2×26012661400² (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 23 ways as a sum of consecutive naturals, for example, 1471816 + ... + 1489384.

Almost surely, 2^26012661400 is an apocalyptic number.

26012661400 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 26012661400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33039682200).

26012661400 is an abundant number, since it is smaller than the sum of its proper divisors (40066703000).

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

26012661400 is a wasteful number, since it uses less digits than its factorization.

26012661400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18269 (or 18260 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 26012661400 in words is "twenty-six billion, twelve million, six hundred sixty-one thousand, four hundred".