70771811329 has 4 divisors (see below), whose sum is σ = 70797116884. Its totient is φ = 70746505776.

The previous prime is 70771811321. The next prime is 70771811347. The reversal of 70771811329 is 92311817707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92311817707 = 61 ⋅1513308487.

It can be written as a sum of positive squares in 2 ways, for example, as 58589170704 + 12182640625 = 242052^2 + 110375^2 .

It is a cyclic number.

It is not a de Polignac number, because 70771811329 - 2³ = 70771811321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70771811321) 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, 12648582 + ... + 12654175.

It is an arithmetic number, because the mean of its divisors is an integer number (17699279221).

Almost surely, 2^70771811329 is an apocalyptic number.

It is an amenable number.

70771811329 is a deficient number, since it is larger than the sum of its proper divisors (25305555).

70771811329 is a wasteful number, since it uses less digits than its factorization.

70771811329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25305554.

The product of its (nonzero) digits is 148176, while the sum is 46.

The spelling of 70771811329 in words is "seventy billion, seven hundred seventy-one million, eight hundred eleven thousand, three hundred twenty-nine".