87449820515 has 8 divisors (see below), whose sum is σ = 106660109328. Its totient is φ = 68812973280.

The previous prime is 87449820463. The next prime is 87449820539. The reversal of 87449820515 is 51502894478.

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

It is not a de Polignac number, because 87449820515 - 2¹⁶ = 87449754979 is a prime.

It is a super-2 number, since 2×87449820515² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 143360057 + ... + 143360666.

It is an arithmetic number, because the mean of its divisors is an integer number (13332513666).

Almost surely, 2^87449820515 is an apocalyptic number.

87449820515 is a deficient number, since it is larger than the sum of its proper divisors (19210288813).

87449820515 is a wasteful number, since it uses less digits than its factorization.

87449820515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286720789.

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 87449820515 in words is "eighty-seven billion, four hundred forty-nine million, eight hundred twenty thousand, five hundred fifteen".