70556161 has 4 divisors (see below), whose sum is σ = 75983572. Its totient is φ = 65128752.

The previous prime is 70556149. The next prime is 70556191. The reversal of 70556161 is 16165507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35521600 + 35034561 = 5960^2 + 5919^2 .

It is not a de Polignac number, because 70556161 - 2¹⁹ = 70031873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70556131) 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, 2713686 + ... + 2713711.

It is an arithmetic number, because the mean of its divisors is an integer number (18995893).

Almost surely, 2^70556161 is an apocalyptic number.

It is an amenable number.

70556161 is a deficient number, since it is larger than the sum of its proper divisors (5427411).

70556161 is a wasteful number, since it uses less digits than its factorization.

70556161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427410.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 70556161 is about 8399.7714849870. The cubic root of 70556161 is about 413.2171273365.

The spelling of 70556161 in words is "seventy million, five hundred fifty-six thousand, one hundred sixty-one".