1672307545891 has 2 divisors, whose sum is σ = 1672307545892. Its totient is φ = 1672307545890.

The previous prime is 1672307545879. The next prime is 1672307545907. The reversal of 1672307545891 is 1985457032761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1672307545891 - 2⁷ = 1672307545763 is a prime.

It is a super-2 number, since 2×1672307545891² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1672307543891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836153772945 + 836153772946.

It is an arithmetic number, because the mean of its divisors is an integer number (836153772946).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1672307545891 = 3344615091782, but 3⋅1672307545891 = 5016922637673 is not.

Almost surely, 2^{1672307545891} is an apocalyptic number.

1672307545891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672307545891 is an equidigital number, since it uses as much as digits as its factorization.

1672307545891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 1672307545891 in words is "one trillion, six hundred seventy-two billion, three hundred seven million, five hundred forty-five thousand, eight hundred ninety-one".