70389016861 has 2 divisors, whose sum is σ = 70389016862. Its totient is φ = 70389016860.

The previous prime is 70389016823. The next prime is 70389016871. The reversal of 70389016861 is 16861098307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60426980761 + 9962036100 = 245819^2 + 99810^2 .

It is a cyclic number.

It is not a de Polignac number, because 70389016861 - 2²⁹ = 69852145949 is a prime.

It is a super-2 number, since 2×70389016861² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70389016801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35194508430 + 35194508431.

It is an arithmetic number, because the mean of its divisors is an integer number (35194508431).

Almost surely, 2^70389016861 is an apocalyptic number.

It is an amenable number.

70389016861 is a deficient number, since it is larger than the sum of its proper divisors (1).

70389016861 is an equidigital number, since it uses as much as digits as its factorization.

70389016861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 70389016861 in words is "seventy billion, three hundred eighty-nine million, sixteen thousand, eight hundred sixty-one".