70445309729 has 2 divisors, whose sum is σ = 70445309730. Its totient is φ = 70445309728.

The previous prime is 70445309707. The next prime is 70445309827. The reversal of 70445309729 is 92790354407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54229834129 + 16215475600 = 232873^2 + 127340^2 .

It is a cyclic number.

It is not a de Polignac number, because 70445309729 - 2¹⁶ = 70445244193 is a prime.

It is not a weakly prime, because it can be changed into another prime (70445309629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35222654864 + 35222654865.

It is an arithmetic number, because the mean of its divisors is an integer number (35222654865).

Almost surely, 2^70445309729 is an apocalyptic number.

It is an amenable number.

70445309729 is a deficient number, since it is larger than the sum of its proper divisors (1).

70445309729 is an equidigital number, since it uses as much as digits as its factorization.

70445309729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 70445309729 in words is "seventy billion, four hundred forty-five million, three hundred nine thousand, seven hundred twenty-nine".