87659722643 has 8 divisors (see below), whose sum is σ = 91390744368. Its totient is φ = 84005629344.

The previous prime is 87659722639. The next prime is 87659722663. The reversal of 87659722643 is 34622795678.

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

It is a cyclic number.

It is not a de Polignac number, because 87659722643 - 2² = 87659722639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87659722603) 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, 19229780 + ... + 19234337.

It is an arithmetic number, because the mean of its divisors is an integer number (11423843046).

Almost surely, 2^87659722643 is an apocalyptic number.

87659722643 is a deficient number, since it is larger than the sum of its proper divisors (3731021725).

87659722643 is a wasteful number, since it uses less digits than its factorization.

87659722643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38464213.

The product of its digits is 30481920, while the sum is 59.

The spelling of 87659722643 in words is "eighty-seven billion, six hundred fifty-nine million, seven hundred twenty-two thousand, six hundred forty-three".