15781730466 has 8 divisors (see below), whose sum is σ = 31563460944. Its totient is φ = 5260576820.

The previous prime is 15781730423. The next prime is 15781730477. The reversal of 15781730466 is 66403718751.

It is a sphenic number, since it is the product of 3 distinct primes.

15781730466 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315144200 + ... + 1315144211.

It is an arithmetic number, because the mean of its divisors is an integer number (3945432618).

Almost surely, 2^15781730466 is an apocalyptic number.

15781730466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15781730466 is a wasteful number, since it uses less digits than its factorization.

15781730466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630288416.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 15781730466 in words is "fifteen billion, seven hundred eighty-one million, seven hundred thirty thousand, four hundred sixty-six".