15550116985 has 8 divisors (see below), whose sum is σ = 20095535880. Its totient is φ = 11483163264.

The previous prime is 15550116919. The next prime is 15550117003. The reversal of 15550116985 is 58961105551.

It can be written as a sum of positive squares in 4 ways, for example, as 1822948416 + 13727168569 = 42696^2 + 117163^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15550116985 - 2¹⁵ = 15550084217 is a prime.

It is a super-2 number, since 2×15550116985² (a number of 21 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 119616220 + ... + 119616349.

It is an arithmetic number, because the mean of its divisors is an integer number (2511941985).

Almost surely, 2^15550116985 is an apocalyptic number.

It is an amenable number.

15550116985 is a deficient number, since it is larger than the sum of its proper divisors (4545418895).

15550116985 is a wasteful number, since it uses less digits than its factorization.

15550116985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239232587.

The product of its (nonzero) digits is 270000, while the sum is 46.

The spelling of 15550116985 in words is "fifteen billion, five hundred fifty million, one hundred sixteen thousand, nine hundred eighty-five".