70478855819557 has 2 divisors, whose sum is σ = 70478855819558. Its totient is φ = 70478855819556.

The previous prime is 70478855819551. The next prime is 70478855819569. The reversal of 70478855819557 is 75591855887407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70276181181921 + 202674637636 = 8383089^2 + 450194^2 .

It is a cyclic number.

It is not a de Polignac number, because 70478855819557 - 2¹⁹ = 70478855295269 is a prime.

It is a super-2 number, since 2×70478855819557² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70478855819551) 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, 35239427909778 + 35239427909779.

It is an arithmetic number, because the mean of its divisors is an integer number (35239427909779).

Almost surely, 2^{70478855819557} is an apocalyptic number.

It is an amenable number.

70478855819557 is a deficient number, since it is larger than the sum of its proper divisors (1).

70478855819557 is an equidigital number, since it uses as much as digits as its factorization.

70478855819557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3951360000, while the sum is 79.

The spelling of 70478855819557 in words is "seventy trillion, four hundred seventy-eight billion, eight hundred fifty-five million, eight hundred nineteen thousand, five hundred fifty-seven".