161101822140788 has 6 divisors (see below), whose sum is σ = 281928188746386. Its totient is φ = 80550911070392.

The previous prime is 161101822140761. The next prime is 161101822140803. The reversal of 161101822140788 is 887041228101161.

It can be written as a sum of positive squares in only one way, i.e., 159310138163344 + 1791683977444 = 12621812^2 + 1338538^2 .

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, 20137727767595 + ... + 20137727767602.

It is an arithmetic number, because the mean of its divisors is an integer number (46988031457731).

Almost surely, 2^{161101822140788} is an apocalyptic number.

It is an amenable number.

161101822140788 is a deficient number, since it is larger than the sum of its proper divisors (120826366605598).

161101822140788 is a wasteful number, since it uses less digits than its factorization.

161101822140788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40275455535201 (or 40275455535199 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 50.

The spelling of 161101822140788 in words is "one hundred sixty-one trillion, one hundred one billion, eight hundred twenty-two million, one hundred forty thousand, seven hundred eighty-eight".