87777797959 has 8 divisors (see below), whose sum is σ = 88100676000. Its totient is φ = 87455356032.

The previous prime is 87777797917. The next prime is 87777797969. The reversal of 87777797959 is 95979777778.

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 87777797959 - 2⁹ = 87777797447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87777797969) 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, 297027 + ... + 513595.

It is an arithmetic number, because the mean of its divisors is an integer number (11012584500).

Almost surely, 2^87777797959 is an apocalyptic number.

87777797959 is a deficient number, since it is larger than the sum of its proper divisors (322878041).

87777797959 is a wasteful number, since it uses less digits than its factorization.

87777797959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218057.

The product of its digits is 3430644840, while the sum is 82.

The spelling of 87777797959 in words is "eighty-seven billion, seven hundred seventy-seven million, seven hundred ninety-seven thousand, nine hundred fifty-nine".