87018741842 has 6 divisors (see below), whose sum is σ = 130528738533. Its totient is φ = 43509162332.

The previous prime is 87018741841. The next prime is 87018741847. The reversal of 87018741842 is 24814781078.

It can be written as a sum of positive squares in 2 ways, for example, as 80541872401 + 6476869441 = 283799^2 + 80479^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=208589.

It is a super-2 number, since 2×87018741842² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87018741841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 312884 + ... + 521472.

Almost surely, 2^87018741842 is an apocalyptic number.

87018741842 is a deficient number, since it is larger than the sum of its proper divisors (43509996691).

87018741842 is an frugal number, since it uses more digits than its factorization.

87018741842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417180 (or 208591 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 50.

Multiplying 87018741842 by its sum of digits (50), we get a square (4350937092100 = 2085890²).

The spelling of 87018741842 in words is "eighty-seven billion, eighteen million, seven hundred forty-one thousand, eight hundred forty-two".