26387861760 has 216 divisors, whose sum is σ = 98322830424. Its totient is φ = 6495436800.

The previous prime is 26387861723. The next prime is 26387861777. The reversal of 26387861760 is 6716878362.

It can be written as a sum of positive squares in 4 ways, for example, as 50466816 + 26337394944 = 7104^2 + 162288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26387861697 and 26387861706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61660 + ... + 237860.

It is an arithmetic number, because the mean of its divisors is an integer number (455198289).

Almost surely, 2^26387861760 is an apocalyptic number.

26387861760 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 26387861760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49161415212).

26387861760 is an abundant number, since it is smaller than the sum of its proper divisors (71934968664).

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

26387861760 is a wasteful number, since it uses less digits than its factorization.

26387861760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176241 (or 176224 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 26387861760 in words is "twenty-six billion, three hundred eighty-seven million, eight hundred sixty-one thousand, seven hundred sixty".