26512136450 has 18 divisors (see below), whose sum is σ = 49314715401. Its totient is φ = 10604394040.

The previous prime is 26512136447. The next prime is 26512136461. The reversal of 26512136450 is 5463121562.

It can be written as a sum of positive squares in 2 ways, for example, as 25981893721 + 530242729 = 161189^2 + 23027^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=115135.

It is a super-3 number, since 3×26512136450³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26512136450.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1139837 + ... + 1162863.

Almost surely, 2^26512136450 is an apocalyptic number.

26512136450 is a deficient number, since it is larger than the sum of its proper divisors (22802578951).

26512136450 is an frugal number, since it uses more digits than its factorization.

26512136450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46066 (or 23034 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 26512136450 in words is "twenty-six billion, five hundred twelve million, one hundred thirty-six thousand, four hundred fifty".