70991211457 has 2 divisors, whose sum is σ = 70991211458. Its totient is φ = 70991211456.

The previous prime is 70991211433. The next prime is 70991211491. The reversal of 70991211457 is 75411219907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63685064881 + 7306146576 = 252359^2 + 85476^2 .

It is a cyclic number.

It is not a de Polignac number, because 70991211457 - 2¹¹ = 70991209409 is a prime.

It is a super-3 number, since 3×70991211457³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (70991211427) 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, 35495605728 + 35495605729.

It is an arithmetic number, because the mean of its divisors is an integer number (35495605729).

Almost surely, 2^70991211457 is an apocalyptic number.

It is an amenable number.

70991211457 is a deficient number, since it is larger than the sum of its proper divisors (1).

70991211457 is an equidigital number, since it uses as much as digits as its factorization.

70991211457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 46.

The spelling of 70991211457 in words is "seventy billion, nine hundred ninety-one million, two hundred eleven thousand, four hundred fifty-seven".