87879516645 has 16 divisors (see below), whose sum is σ = 144036672192. Its totient is φ = 45725927040.

The previous prime is 87879516617. The next prime is 87879516667. The reversal of 87879516645 is 54661597878.

It is a happy number.

It is not a de Polignac number, because 87879516645 - 2¹⁰ = 87879515621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71446147 + ... + 71447376.

It is an arithmetic number, because the mean of its divisors is an integer number (9002292012).

Almost surely, 2^87879516645 is an apocalyptic number.

It is an amenable number.

87879516645 is a deficient number, since it is larger than the sum of its proper divisors (56157155547).

87879516645 is a wasteful number, since it uses less digits than its factorization.

87879516645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142893572.

The product of its digits is 101606400, while the sum is 66.

The spelling of 87879516645 in words is "eighty-seven billion, eight hundred seventy-nine million, five hundred sixteen thousand, six hundred forty-five".