70986842786161 has 9 divisors (see below), whose sum is σ = 71382735593793. Its totient is φ = 70593133718160.

The previous prime is 70986842786113. The next prime is 70986842786173. The reversal of 70986842786161 is 16168724868907.

The square root of 70986842786161 is 8425369.

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 271525408561 + 70715317377600 = 521081^2 + 8409240^2 .

It is not a de Polignac number, because 70986842786161 - 2⁷ = 70986842786033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70986842783161) 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, 1524968515 + ... + 1525015063.

It is an arithmetic number, because the mean of its divisors is an integer number (7931415065977).

Almost surely, 2^{70986842786161} is an apocalyptic number.

70986842786161 is the 8425369-th square number.

70986842786161 is the 4212685-th centered octagonal number.

It is an amenable number.

70986842786161 is a deficient number, since it is larger than the sum of its proper divisors (395892807632).

70986842786161 is an frugal number, since it uses more digits than its factorization.

70986842786161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93460 (or 46730 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 73.

The spelling of 70986842786161 in words is "seventy trillion, nine hundred eighty-six billion, eight hundred forty-two million, seven hundred eighty-six thousand, one hundred sixty-one".