161251447361 has 8 divisors (see below), whose sum is σ = 164589648000. Its totient is φ = 157933417680.

The previous prime is 161251447333. The next prime is 161251447363. The reversal of 161251447361 is 163744152161.

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 161251447361 - 2⁶ = 161251447297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161251447363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5026586 + ... + 5058563.

It is an arithmetic number, because the mean of its divisors is an integer number (20573706000).

Almost surely, 2^161251447361 is an apocalyptic number.

It is an amenable number.

161251447361 is a deficient number, since it is larger than the sum of its proper divisors (3338200639).

161251447361 is a wasteful number, since it uses less digits than its factorization.

161251447361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10085479.

The product of its digits is 120960, while the sum is 41.

The spelling of 161251447361 in words is "one hundred sixty-one billion, two hundred fifty-one million, four hundred forty-seven thousand, three hundred sixty-one".