120685156859873 has 2 divisors, whose sum is σ = 120685156859874. Its totient is φ = 120685156859872.

The previous prime is 120685156859857. The next prime is 120685156859923. The reversal of 120685156859873 is 378958651586021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96342705346624 + 24342451513249 = 9815432^2 + 4933807^2 .

It is a cyclic number.

It is not a de Polignac number, because 120685156859873 - 2⁴ = 120685156859857 is a prime.

It is a super-2 number, since 2×120685156859873² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120685156859873.

It is not a weakly prime, because it can be changed into another prime (120685156859473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60342578429936 + 60342578429937.

It is an arithmetic number, because the mean of its divisors is an integer number (60342578429937).

Almost surely, 2^{120685156859873} is an apocalyptic number.

It is an amenable number.

120685156859873 is a deficient number, since it is larger than the sum of its proper divisors (1).

120685156859873 is an equidigital number, since it uses as much as digits as its factorization.

120685156859873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912000, while the sum is 74.

The spelling of 120685156859873 in words is "one hundred twenty trillion, six hundred eighty-five billion, one hundred fifty-six million, eight hundred fifty-nine thousand, eight hundred seventy-three".