69828087218 has 18 divisors (see below), whose sum is σ = 106581164511. Its totient is φ = 34311442684.

The previous prime is 69828087169. The next prime is 69828087221. The reversal of 69828087218 is 81278082896.

It can be written as a sum of positive squares in only one way, i.e., 34914043609 + 34914043609 = 186853^2 + 186853^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=186853.

It is a super-2 number, since 2×69828087218² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22047071 + ... + 22050237.

Almost surely, 2^69828087218 is an apocalyptic number.

69828087218 is a deficient number, since it is larger than the sum of its proper divisors (36753077293).

69828087218 is an frugal number, since it uses more digits than its factorization.

69828087218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454 (or 3228 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 59.

The spelling of 69828087218 in words is "sixty-nine billion, eight hundred twenty-eight million, eighty-seven thousand, two hundred eighteen".