70705161 has 24 divisors (see below), whose sum is σ = 107407560. Its totient is φ = 44755200.

The previous prime is 70705153. The next prime is 70705177. The reversal of 70705161 is 16150707.

It can be written as a sum of positive squares in 4 ways, for example, as 145161 + 70560000 = 381^2 + 8400^2 .

It is not a de Polignac number, because 70705161 - 2³ = 70705153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70705111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13701 + ... + 18141.

It is an arithmetic number, because the mean of its divisors is an integer number (4475315).

Almost surely, 2^70705161 is an apocalyptic number.

It is an amenable number.

70705161 is a deficient number, since it is larger than the sum of its proper divisors (36702399).

70705161 is a wasteful number, since it uses less digits than its factorization.

70705161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537 (or 4534 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 70705161 is about 8408.6360963000. The cubic root of 70705161 is about 413.5077991518.

Adding to 70705161 its reverse (16150707), we get a palindrome (86855868).

The spelling of 70705161 in words is "seventy million, seven hundred five thousand, one hundred sixty-one".