15381166770 has 144 divisors (see below), whose sum is σ = 42437461248. Its totient is φ = 3861095040.

The previous prime is 15381166747. The next prime is 15381166813. The reversal of 15381166770 is 7766118351.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 71 ways as a sum of consecutive naturals, for example, 3817497 + ... + 3821523.

It is an arithmetic number, because the mean of its divisors is an integer number (294704592).

Almost surely, 2^15381166770 is an apocalyptic number.

15381166770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15381166770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21218730624).

15381166770 is an abundant number, since it is smaller than the sum of its proper divisors (27056294478).

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

15381166770 is a wasteful number, since it uses less digits than its factorization.

15381166770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145 (or 4105 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 15381166770 in words is "fifteen billion, three hundred eighty-one million, one hundred sixty-six thousand, seven hundred seventy".