70630362581 has 4 divisors (see below), whose sum is σ = 70630947564. Its totient is φ = 70629777600.

The previous prime is 70630362487. The next prime is 70630362619. The reversal of 70630362581 is 18526303607.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 42215866225 + 28414496356 = 205465^2 + 168566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70630362581 is a prime.

It is a super-2 number, since 2×70630362581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70630362181) 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, 36980 + ... + 377661.

It is an arithmetic number, because the mean of its divisors is an integer number (17657736891).

Almost surely, 2^70630362581 is an apocalyptic number.

It is an amenable number.

70630362581 is a deficient number, since it is larger than the sum of its proper divisors (584983).

70630362581 is a wasteful number, since it uses less digits than its factorization.

70630362581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584982.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 70630362581 in words is "seventy billion, six hundred thirty million, three hundred sixty-two thousand, five hundred eighty-one".