70944777161 has 2 divisors, whose sum is σ = 70944777162. Its totient is φ = 70944777160.

The previous prime is 70944777151. The next prime is 70944777181. The reversal of 70944777161 is 16177744907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56765921536 + 14178855625 = 238256^2 + 119075^2 .

It is a cyclic number.

It is not a de Polignac number, because 70944777161 - 2²² = 70940582857 is a prime.

It is a super-2 number, since 2×70944777161² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70944777131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35472388580 + 35472388581.

It is an arithmetic number, because the mean of its divisors is an integer number (35472388581).

Almost surely, 2^70944777161 is an apocalyptic number.

It is an amenable number.

70944777161 is a deficient number, since it is larger than the sum of its proper divisors (1).

70944777161 is an equidigital number, since it uses as much as digits as its factorization.

70944777161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2074464, while the sum is 53.

The spelling of 70944777161 in words is "seventy billion, nine hundred forty-four million, seven hundred seventy-seven thousand, one hundred sixty-one".