70509491641 has 2 divisors, whose sum is σ = 70509491642. Its totient is φ = 70509491640.

The previous prime is 70509491639. The next prime is 70509491653. The reversal of 70509491641 is 14619490507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35577881641 + 34931610000 = 188621^2 + 186900^2 .

It is a cyclic number.

It is not a de Polignac number, because 70509491641 - 2¹ = 70509491639 is a prime.

It is a super-2 number, since 2×70509491641² (a number of 22 digits) contains 22 as substring.

Together with 70509491639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 70509491591 and 70509491600.

It is not a weakly prime, because it can be changed into another prime (70509491671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35254745820 + 35254745821.

It is an arithmetic number, because the mean of its divisors is an integer number (35254745821).

Almost surely, 2^70509491641 is an apocalyptic number.

It is an amenable number.

70509491641 is a deficient number, since it is larger than the sum of its proper divisors (1).

70509491641 is an equidigital number, since it uses as much as digits as its factorization.

70509491641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 70509491641 in words is "seventy billion, five hundred nine million, four hundred ninety-one thousand, six hundred forty-one".