70325205721 has 9 divisors (see below), whose sum is σ = 70599147133. Its totient is φ = 70052326240.

The previous prime is 70325205707. The next prime is 70325205749. The reversal of 70325205721 is 12750252307.

The square root of 70325205721 is 265189.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 977250121 + 69347955600 = 31261^2 + 263340^2 .

It is not a de Polignac number, because 70325205721 - 2¹⁹ = 70324681433 is a prime.

It is a super-2 number, since 2×70325205721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70325205751) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 134980941 + ... + 134981461.

Almost surely, 2^70325205721 is an apocalyptic number.

70325205721 is the 265189-th square number.

70325205721 is the 132595-th centered octagonal number.

It is an amenable number.

70325205721 is a deficient number, since it is larger than the sum of its proper divisors (273941412).

70325205721 is an frugal number, since it uses more digits than its factorization.

70325205721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The spelling of 70325205721 in words is "seventy billion, three hundred twenty-five million, two hundred five thousand, seven hundred twenty-one".