87148665838 has 16 divisors (see below), whose sum is σ = 142229944080. Its totient is φ = 39807795456.

The previous prime is 87148665827. The next prime is 87148665847. The reversal of 87148665838 is 83856684178.

It is a self number, because there is not a number n which added to its sum of digits gives 87148665838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17275168 + ... + 17280211.

It is an arithmetic number, because the mean of its divisors is an integer number (8889371505).

Almost surely, 2^87148665838 is an apocalyptic number.

87148665838 is a deficient number, since it is larger than the sum of its proper divisors (55081278242).

87148665838 is a wasteful number, since it uses less digits than its factorization.

87148665838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34555491.

The product of its digits is 61931520, while the sum is 64.

The spelling of 87148665838 in words is "eighty-seven billion, one hundred forty-eight million, six hundred sixty-five thousand, eight hundred thirty-eight".