70381684621 has 4 divisors (see below), whose sum is σ = 70463811132. Its totient is φ = 70299558112.

The previous prime is 70381684619. The next prime is 70381684627. The reversal of 70381684621 is 12648618307.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33165873225 + 37215811396 = 182115^2 + 192914^2 .

It is a cyclic number.

It is not a de Polignac number, because 70381684621 - 2¹ = 70381684619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70381684627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41061970 + ... + 41063683.

It is an arithmetic number, because the mean of its divisors is an integer number (17615952783).

Almost surely, 2^70381684621 is an apocalyptic number.

It is an amenable number.

70381684621 is a deficient number, since it is larger than the sum of its proper divisors (82126511).

70381684621 is an equidigital number, since it uses as much as digits as its factorization.

70381684621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82126510.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 70381684621 in words is "seventy billion, three hundred eighty-one million, six hundred eighty-four thousand, six hundred twenty-one".