1671267605427 has 16 divisors (see below), whose sum is σ = 2829659438080. Its totient is φ = 955010060136.

The previous prime is 1671267605353. The next prime is 1671267605429. The reversal of 1671267605427 is 7245067621761.

1671267605427 is a `hidden beast` number, since 1 + 6 + 7 + 1 + 2 + 6 + 7 + 605 + 4 + 27 = 666.

It is not a de Polignac number, because 1671267605427 - 2⁸ = 1671267605171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671267605429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4421342683 + ... + 4421343060.

It is an arithmetic number, because the mean of its divisors is an integer number (176853714880).

Almost surely, 2^{1671267605427} is an apocalyptic number.

1671267605427 is a deficient number, since it is larger than the sum of its proper divisors (1158391832653).

1671267605427 is an equidigital number, since it uses as much as digits as its factorization.

1671267605427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8842685759 (or 8842685753 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 1671267605427 in words is "one trillion, six hundred seventy-one billion, two hundred sixty-seven million, six hundred five thousand, four hundred twenty-seven".