15484955891866 has 4 divisors (see below), whose sum is σ = 23227433837802. Its totient is φ = 7742477945932.

The previous prime is 15484955891827. The next prime is 15484955891903. The reversal of 15484955891866 is 66819855948451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15396402630625 + 88553261241 = 3923825^2 + 297579^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3871238972965 + ... + 3871238972968.

Almost surely, 2^{15484955891866} is an apocalyptic number.

15484955891866 is a deficient number, since it is larger than the sum of its proper divisors (7742477945936).

15484955891866 is an equidigital number, since it uses as much as digits as its factorization.

15484955891866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742477945935.

The product of its digits is 2985984000, while the sum is 79.

The spelling of 15484955891866 in words is "fifteen trillion, four hundred eighty-four billion, nine hundred fifty-five million, eight hundred ninety-one thousand, eight hundred sixty-six".