161254225144 has 8 divisors (see below), whose sum is σ = 302351672160. Its totient is φ = 80627112568.

The previous prime is 161254225127. The next prime is 161254225151. The reversal of 161254225144 is 441522452161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078389064 + ... + 10078389079.

It is an arithmetic number, because the mean of its divisors is an integer number (37793959020).

Almost surely, 2^161254225144 is an apocalyptic number.

It is an amenable number.

161254225144 is a deficient number, since it is larger than the sum of its proper divisors (141097447016).

161254225144 is a wasteful number, since it uses less digits than its factorization.

161254225144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20156778149 (or 20156778145 counting only the distinct ones).

The product of its digits is 76800, while the sum is 37.

The spelling of 161254225144 in words is "one hundred sixty-one billion, two hundred fifty-four million, two hundred twenty-five thousand, one hundred forty-four".