70272542561581 has 2 divisors, whose sum is σ = 70272542561582. Its totient is φ = 70272542561580.

The previous prime is 70272542561579. The next prime is 70272542561653. The reversal of 70272542561581 is 18516524527207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63931362412681 + 6341180148900 = 7995709^2 + 2518170^2 .

It is a cyclic number.

It is not a de Polignac number, because 70272542561581 - 2¹ = 70272542561579 is a prime.

It is a super-2 number, since 2×70272542561581² (a number of 28 digits) contains 22 as substring.

Together with 70272542561579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70272542561981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35136271280790 + 35136271280791.

It is an arithmetic number, because the mean of its divisors is an integer number (35136271280791).

Almost surely, 2^{70272542561581} is an apocalyptic number.

It is an amenable number.

70272542561581 is a deficient number, since it is larger than the sum of its proper divisors (1).

70272542561581 is an equidigital number, since it uses as much as digits as its factorization.

70272542561581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 70272542561581 in words is "seventy trillion, two hundred seventy-two billion, five hundred forty-two million, five hundred sixty-one thousand, five hundred eighty-one".