87719824649 has 8 divisors (see below), whose sum is σ = 88652770752. Its totient is φ = 86788442160.

The previous prime is 87719824613. The next prime is 87719824681. The reversal of 87719824649 is 94642891778.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87719824649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87719844649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277934 + ... + 502679.

It is an arithmetic number, because the mean of its divisors is an integer number (11081596344).

Almost surely, 2^87719824649 is an apocalyptic number.

It is an amenable number.

87719824649 is a deficient number, since it is larger than the sum of its proper divisors (932946103).

87719824649 is a wasteful number, since it uses less digits than its factorization.

87719824649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781807.

The product of its digits is 48771072, while the sum is 65.

The spelling of 87719824649 in words is "eighty-seven billion, seven hundred nineteen million, eight hundred twenty-four thousand, six hundred forty-nine".