10866726989540 has 24 divisors (see below), whose sum is σ = 22820414681400. Its totient is φ = 4346635938048.

The previous prime is 10866726989537. The next prime is 10866726989549. The reversal of 10866726989540 is 4598962766801.

It can be written as a sum of positive squares in 4 ways, for example, as 1119380928064 + 9747346061476 = 1058008^2 + 3122074^2 .

It is not an unprimeable number, because it can be changed into a prime (10866726989549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785065 + ... + 4991984.

It is an arithmetic number, because the mean of its divisors is an integer number (950850611725).

Almost surely, 2^{10866726989540} is an apocalyptic number.

10866726989540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10866726989540 is an abundant number, since it is smaller than the sum of its proper divisors (11953687691860).

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

10866726989540 is a wasteful number, since it uses less digits than its factorization.

10866726989540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6857231 (or 6857229 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 10866726989540 in words is "ten trillion, eight hundred sixty-six billion, seven hundred twenty-six million, nine hundred eighty-nine thousand, five hundred forty".