87015516449 has 6 divisors (see below), whose sum is σ = 88906304034. Its totient is φ = 85164120320.

The previous prime is 87015516439. The next prime is 87015516457. The reversal of 87015516449 is 94461551078.

It can be written as a sum of positive squares in only one way, i.e., 78046479424 + 8969037025 = 279368^2 + 94705^2 .

It is a de Polignac number, because none of the positive numbers 2^k-87015516449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87015516397 and 87015516406.

It is not an unprimeable number, because it can be changed into a prime (87015516439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19693472 + ... + 19697889.

It is an arithmetic number, because the mean of its divisors is an integer number (14817717339).

Almost surely, 2^87015516449 is an apocalyptic number.

It is an amenable number.

87015516449 is a deficient number, since it is larger than the sum of its proper divisors (1890787585).

87015516449 is an equidigital number, since it uses as much as digits as its factorization.

87015516449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39391455 (or 39391408 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 87015516449 in words is "eighty-seven billion, fifteen million, five hundred sixteen thousand, four hundred forty-nine".