70694795521 has 6 divisors (see below), whose sum is σ = 82236803010. Its totient is φ = 60595538976.

The previous prime is 70694795519. The next prime is 70694795531. The reversal of 70694795521 is 12559749607.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40248384400 + 30446411121 = 200620^2 + 174489^2 .

It is not a de Polignac number, because 70694795521 - 2¹ = 70694795519 is a prime.

It is a super-2 number, since 2×70694795521² (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 (70694795531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 721375416 + ... + 721375513.

It is an arithmetic number, because the mean of its divisors is an integer number (13706133835).

Almost surely, 2^70694795521 is an apocalyptic number.

It is an amenable number.

70694795521 is a deficient number, since it is larger than the sum of its proper divisors (11542007489).

70694795521 is a wasteful number, since it uses less digits than its factorization.

70694795521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442750943 (or 1442750936 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 70694795521 in words is "seventy billion, six hundred ninety-four million, seven hundred ninety-five thousand, five hundred twenty-one".