87800111817 has 32 divisors (see below), whose sum is σ = 129702629760. Its totient is φ = 52387845120.

The previous prime is 87800111809. The next prime is 87800111857. The reversal of 87800111817 is 71811100878.

It is not a de Polignac number, because 87800111817 - 2³ = 87800111809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87800111807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 486993 + ... + 642465.

It is an arithmetic number, because the mean of its divisors is an integer number (4053207180).

Almost surely, 2^87800111817 is an apocalyptic number.

It is an amenable number.

87800111817 is a deficient number, since it is larger than the sum of its proper divisors (41902517943).

87800111817 is a wasteful number, since it uses less digits than its factorization.

87800111817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155753.

The product of its (nonzero) digits is 25088, while the sum is 42.

The spelling of 87800111817 in words is "eighty-seven billion, eight hundred million, one hundred eleven thousand, eight hundred seventeen".