70781519273 has 2 divisors, whose sum is σ = 70781519274. Its totient is φ = 70781519272.

The previous prime is 70781519251. The next prime is 70781519309. The reversal of 70781519273 is 37291518707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70367111824 + 414407449 = 265268^2 + 20357^2 .

It is an emirp because it is prime and its reverse (37291518707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70781519273 - 2²⁴ = 70764742057 is a prime.

It is not a weakly prime, because it can be changed into another prime (70781519873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35390759636 + 35390759637.

It is an arithmetic number, because the mean of its divisors is an integer number (35390759637).

Almost surely, 2^70781519273 is an apocalyptic number.

It is an amenable number.

70781519273 is a deficient number, since it is larger than the sum of its proper divisors (1).

70781519273 is an equidigital number, since it uses as much as digits as its factorization.

70781519273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 50.

The spelling of 70781519273 in words is "seventy billion, seven hundred eighty-one million, five hundred nineteen thousand, two hundred seventy-three".