161103356418 has 64 divisors (see below), whose sum is σ = 344101063680. Its totient is φ = 50134996800.

The previous prime is 161103356387. The next prime is 161103356431. The reversal of 161103356418 is 814653301161.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28059028 + ... + 28064768.

It is an arithmetic number, because the mean of its divisors is an integer number (5376579120).

Almost surely, 2^161103356418 is an apocalyptic number.

161103356418 is an abundant number, since it is smaller than the sum of its proper divisors (182997707262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161103356418 is a wasteful number, since it uses less digits than its factorization.

161103356418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303.

The product of its (nonzero) digits is 51840, while the sum is 39.

Adding to 161103356418 its reverse (814653301161), we get a palindrome (975756657579).

The spelling of 161103356418 in words is "one hundred sixty-one billion, one hundred three million, three hundred fifty-six thousand, four hundred eighteen".