161381480726641 has 8 divisors (see below), whose sum is σ = 185657408292224. Its totient is φ = 137410910740800.

The previous prime is 161381480726569. The next prime is 161381480726777. The reversal of 161381480726641 is 146627084183161.

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 161381480726641 - 2⁹ = 161381480726129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161381480721641) 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, 76339393800 + ... + 76339395913.

It is an arithmetic number, because the mean of its divisors is an integer number (23207176036528).

Almost surely, 2^{161381480726641} is an apocalyptic number.

It is an amenable number.

161381480726641 is a deficient number, since it is larger than the sum of its proper divisors (24275927565583).

161381480726641 is a wasteful number, since it uses less digits than its factorization.

161381480726641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152678789871.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 161381480726641 in words is "one hundred sixty-one trillion, three hundred eighty-one billion, four hundred eighty million, seven hundred twenty-six thousand, six hundred forty-one".