26401472500 has 60 divisors (see below), whose sum is σ = 62175950452. Its totient is φ = 9748224000.

The previous prime is 26401472497. The next prime is 26401472533. The reversal of 26401472500 is 527410462.

It can be written as a sum of positive squares in 10 ways, for example, as 17954392036 + 8447080464 = 133994^2 + 91908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 373677 + ... + 438676.

Almost surely, 2^26401472500 is an apocalyptic number.

26401472500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26401472500 is an abundant number, since it is smaller than the sum of its proper divisors (35774477952).

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

26401472500 is a wasteful number, since it uses less digits than its factorization.

26401472500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812390 (or 812373 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 26401472500 its reverse (527410462), we get a palindrome (26928882962).

The spelling of 26401472500 in words is "twenty-six billion, four hundred one million, four hundred seventy-two thousand, five hundred".