161274427643 has 8 divisors (see below), whose sum is σ = 184692102912. Its totient is φ = 137951370216.

The previous prime is 161274427627. The next prime is 161274427673. The reversal of 161274427643 is 346724472161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161274427643 - 2⁴ = 161274427627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161274427673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23650805 + ... + 23657622.

It is an arithmetic number, because the mean of its divisors is an integer number (23086512864).

Almost surely, 2^161274427643 is an apocalyptic number.

161274427643 is a deficient number, since it is larger than the sum of its proper divisors (23417675269).

161274427643 is an equidigital number, since it uses as much as digits as its factorization.

161274427643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47308921.

The product of its digits is 1354752, while the sum is 47.

The spelling of 161274427643 in words is "one hundred sixty-one billion, two hundred seventy-four million, four hundred twenty-seven thousand, six hundred forty-three".