15427770666318 has 96 divisors (see below), whose sum is σ = 36129642719040. Its totient is φ = 4743231736320.

The previous prime is 15427770666311. The next prime is 15427770666331. The reversal of 15427770666318 is 81366607772451.

It is a super-2 number, since 2×15427770666318² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15427770666311) by changing a digit.

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, 8449458 + ... + 10111818.

It is an arithmetic number, because the mean of its divisors is an integer number (376350444990).

Almost surely, 2^{15427770666318} is an apocalyptic number.

15427770666318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15427770666318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18064821359520).

15427770666318 is an abundant number, since it is smaller than the sum of its proper divisors (20701872052722).

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

15427770666318 is a wasteful number, since it uses less digits than its factorization.

15427770666318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663194 (or 1663191 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 63.

The spelling of 15427770666318 in words is "fifteen trillion, four hundred twenty-seven billion, seven hundred seventy million, six hundred sixty-six thousand, three hundred eighteen".