1078661873873 has 2 divisors, whose sum is σ = 1078661873874. Its totient is φ = 1078661873872.

The previous prime is 1078661873857. The next prime is 1078661873917. The reversal of 1078661873873 is 3783781668701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075020596224 + 3641277649 = 1036832^2 + 60343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078661873873 - 2⁴ = 1078661873857 is a prime.

It is a super-2 number, since 2×1078661873873² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1078661873173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539330936936 + 539330936937.

It is an arithmetic number, because the mean of its divisors is an integer number (539330936937).

Almost surely, 2^{1078661873873} is an apocalyptic number.

It is an amenable number.

1078661873873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078661873873 is an equidigital number, since it uses as much as digits as its factorization.

1078661873873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56899584, while the sum is 65.

The spelling of 1078661873873 in words is "one trillion, seventy-eight billion, six hundred sixty-one million, eight hundred seventy-three thousand, eight hundred seventy-three".