15284661485 has 4 divisors (see below), whose sum is σ = 18341593788. Its totient is φ = 12227729184.

The previous prime is 15284661479. The next prime is 15284661541. The reversal of 15284661485 is 58416648251.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11825692516 + 3458968969 = 108746^2 + 58813^2 .

It is a cyclic number.

It is not a de Polignac number, because 15284661485 - 2⁸ = 15284661229 is a prime.

It is a super-2 number, since 2×15284661485² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1528466144 + ... + 1528466153.

It is an arithmetic number, because the mean of its divisors is an integer number (4585398447).

Almost surely, 2^15284661485 is an apocalyptic number.

It is an amenable number.

15284661485 is a deficient number, since it is larger than the sum of its proper divisors (3056932303).

15284661485 is an equidigital number, since it uses as much as digits as its factorization.

15284661485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056932302.

The product of its digits is 1843200, while the sum is 50.

The spelling of 15284661485 in words is "fifteen billion, two hundred eighty-four million, six hundred sixty-one thousand, four hundred eighty-five".