15436140066 has 48 divisors (see below), whose sum is σ = 33668369280. Its totient is φ = 5111124000.

The previous prime is 15436140023. The next prime is 15436140067. The reversal of 15436140066 is 66004163451.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 15436140066.

It is not an unprimeable number, because it can be changed into a prime (15436140067) by changing a digit.

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, 1753111 + ... + 1761893.

It is an arithmetic number, because the mean of its divisors is an integer number (701424360).

Almost surely, 2^15436140066 is an apocalyptic number.

15436140066 is an abundant number, since it is smaller than the sum of its proper divisors (18232229214).

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

15436140066 is a wasteful number, since it uses less digits than its factorization.

15436140066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9431 (or 9428 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 15436140066 in words is "fifteen billion, four hundred thirty-six million, one hundred forty thousand, sixty-six".