87808721273 has 32 divisors (see below), whose sum is σ = 108884832000. Its totient is φ = 68953441536.

The previous prime is 87808721267. The next prime is 87808721309. The reversal of 87808721273 is 37212780878.

It is not a de Polignac number, because 87808721273 - 2¹² = 87808717177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87808723273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28241843 + ... + 28244951.

It is an arithmetic number, because the mean of its divisors is an integer number (3402651000).

Almost surely, 2^87808721273 is an apocalyptic number.

It is an amenable number.

87808721273 is a deficient number, since it is larger than the sum of its proper divisors (21076110727).

87808721273 is a wasteful number, since it uses less digits than its factorization.

87808721273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361.

The product of its (nonzero) digits is 2107392, while the sum is 53.

The spelling of 87808721273 in words is "eighty-seven billion, eight hundred eight million, seven hundred twenty-one thousand, two hundred seventy-three".