70016021720 has 32 divisors (see below), whose sum is σ = 157614567120. Its totient is φ = 27992449920.

The previous prime is 70016021717. The next prime is 70016021731. The reversal of 70016021720 is 2712061007.

It is a self number, because there is not a number n which added to its sum of digits gives 70016021720.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354767 + ... + 515646.

Almost surely, 2^70016021720 is an apocalyptic number.

It is an amenable number.

70016021720 is an abundant number, since it is smaller than the sum of its proper divisors (87598545400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70016021720 is a wasteful number, since it uses less digits than its factorization.

70016021720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872435 (or 872431 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

Adding to 70016021720 its reverse (2712061007), we get a palindrome (72728082727).

The spelling of 70016021720 in words is "seventy billion, sixteen million, twenty-one thousand, seven hundred twenty".