87028981465 has 4 divisors (see below), whose sum is σ = 104434777764. Its totient is φ = 69623185168.

The previous prime is 87028981453. The next prime is 87028981489. The reversal of 87028981465 is 56418982078.

It is a happy number.

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 33104710809 + 53924270656 = 181947^2 + 232216^2 .

It is a cyclic number.

It is not a de Polignac number, because 87028981465 - 2¹¹ = 87028979417 is a prime.

It is a super-2 number, since 2×87028981465² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 8702898142 + ... + 8702898151.

It is an arithmetic number, because the mean of its divisors is an integer number (26108694441).

Almost surely, 2^87028981465 is an apocalyptic number.

It is an amenable number.

87028981465 is a deficient number, since it is larger than the sum of its proper divisors (17405796299).

87028981465 is a wasteful number, since it uses less digits than its factorization.

87028981465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17405796298.

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 87028981465 in words is "eighty-seven billion, twenty-eight million, nine hundred eighty-one thousand, four hundred sixty-five".