70551643777 has 2 divisors, whose sum is σ = 70551643778. Its totient is φ = 70551643776.

The previous prime is 70551643711. The next prime is 70551643793. The reversal of 70551643777 is 77734615507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57465198961 + 13086444816 = 239719^2 + 114396^2 .

It is a cyclic number.

It is not a de Polignac number, because 70551643777 - 2¹¹ = 70551641729 is a prime.

It is not a weakly prime, because it can be changed into another prime (70551641777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35275821888 + 35275821889.

It is an arithmetic number, because the mean of its divisors is an integer number (35275821889).

Almost surely, 2^70551643777 is an apocalyptic number.

It is an amenable number.

70551643777 is a deficient number, since it is larger than the sum of its proper divisors (1).

70551643777 is an equidigital number, since it uses as much as digits as its factorization.

70551643777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4321800, while the sum is 52.

The spelling of 70551643777 in words is "seventy billion, five hundred fifty-one million, six hundred forty-three thousand, seven hundred seventy-seven".