26515136340 has 144 divisors (see below), whose sum is σ = 100275477120. Its totient is φ = 5509635840.

The previous prime is 26515136293. The next prime is 26515136353. The reversal of 26515136340 is 4363151562.

26515136340 is a `hidden beast` number, since 2 + 6 + 5 + 1 + 5 + 13 + 634 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 26515136295 and 26515136304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 942675 + ... + 970394.

It is an arithmetic number, because the mean of its divisors is an integer number (696357480).

Almost surely, 2^26515136340 is an apocalyptic number.

26515136340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26515136340 is an abundant number, since it is smaller than the sum of its proper divisors (73760340780).

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

26515136340 is a wasteful number, since it uses less digits than its factorization.

26515136340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913102 (or 1913097 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 26515136340 in words is "twenty-six billion, five hundred fifteen million, one hundred thirty-six thousand, three hundred forty".