70681436549 has 2 divisors, whose sum is σ = 70681436550. Its totient is φ = 70681436548.

The previous prime is 70681436543. The next prime is 70681436611. The reversal of 70681436549 is 94563418607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57652812100 + 13028624449 = 240110^2 + 114143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70681436549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70681436549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70681436543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35340718274 + 35340718275.

It is an arithmetic number, because the mean of its divisors is an integer number (35340718275).

Almost surely, 2^70681436549 is an apocalyptic number.

It is an amenable number.

70681436549 is a deficient number, since it is larger than the sum of its proper divisors (1).

70681436549 is an equidigital number, since it uses as much as digits as its factorization.

70681436549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 70681436549 in words is "seventy billion, six hundred eighty-one million, four hundred thirty-six thousand, five hundred forty-nine".