70836221618 has 6 divisors (see below), whose sum is σ = 106254897021. Its totient is φ = 35417922612.

The previous prime is 70836221611. The next prime is 70836221627. The reversal of 70836221618 is 81612263807.

It can be written as a sum of positive squares in 2 ways, for example, as 41167192609 + 29669029009 = 202897^2 + 172247^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=188197.

It is a super-2 number, since 2×70836221618² (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 (70836221611) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 282296 + ... + 470492.

Almost surely, 2^70836221618 is an apocalyptic number.

70836221618 is a deficient number, since it is larger than the sum of its proper divisors (35418675403).

70836221618 is an frugal number, since it uses more digits than its factorization.

70836221618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376396 (or 188199 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 70836221618 in words is "seventy billion, eight hundred thirty-six million, two hundred twenty-one thousand, six hundred eighteen".