161633773051 has 8 divisors (see below), whose sum is σ = 172087179264. Its totient is φ = 151285426560.

The previous prime is 161633773013. The next prime is 161633773121. The reversal of 161633773051 is 150377336161.

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 161633773051 - 2²³ = 161625384443 is a prime.

It is a super-2 number, since 2×161633773051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161633772989 and 161633773007.

It is not an unprimeable number, because it can be changed into a prime (161633723051) 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, 26261755 + ... + 26267908.

It is an arithmetic number, because the mean of its divisors is an integer number (21510897408).

Almost surely, 2^161633773051 is an apocalyptic number.

161633773051 is a deficient number, since it is larger than the sum of its proper divisors (10453406213).

161633773051 is a wasteful number, since it uses less digits than its factorization.

161633773051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52529861.

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 161633773051 in words is "one hundred sixty-one billion, six hundred thirty-three million, seven hundred seventy-three thousand, fifty-one".