87781342273 has 32 divisors (see below), whose sum is σ = 98173555200. Its totient is φ = 78096485376.

The previous prime is 87781342241. The next prime is 87781342283. The reversal of 87781342273 is 37224318778.

It is not a de Polignac number, because 87781342273 - 2⁵ = 87781342241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87781342273.

It is not an unprimeable number, because it can be changed into a prime (87781342283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13139548 + ... + 13146226.

It is an arithmetic number, because the mean of its divisors is an integer number (3067923600).

Almost surely, 2^87781342273 is an apocalyptic number.

It is an amenable number.

87781342273 is a deficient number, since it is larger than the sum of its proper divisors (10392212927).

87781342273 is a wasteful number, since it uses less digits than its factorization.

87781342273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7281.

The product of its digits is 3161088, while the sum is 52.

The spelling of 87781342273 in words is "eighty-seven billion, seven hundred eighty-one million, three hundred forty-two thousand, two hundred seventy-three".