161151009541 has 4 divisors (see below), whose sum is σ = 161873660032. Its totient is φ = 160428359052.

The previous prime is 161151009529. The next prime is 161151009557. The reversal of 161151009541 is 145900151161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161151009541 - 2⁹ = 161151009029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161151009497 and 161151009506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161151009581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361324911 + ... + 361325356.

It is an arithmetic number, because the mean of its divisors is an integer number (40468415008).

Almost surely, 2^161151009541 is an apocalyptic number.

It is an amenable number.

161151009541 is a deficient number, since it is larger than the sum of its proper divisors (722650491).

161151009541 is an equidigital number, since it uses as much as digits as its factorization.

161151009541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722650490.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 161151009541 in words is "one hundred sixty-one billion, one hundred fifty-one million, nine thousand, five hundred forty-one".