161193107100 has 36 divisors (see below), whose sum is σ = 466385390744. Its totient is φ = 42984828480.

The previous prime is 161193107081. The next prime is 161193107107. The reversal of 161193107100 is 1701391161.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161193107107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268654879 + ... + 268655478.

Almost surely, 2^161193107100 is an apocalyptic number.

161193107100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161193107100 is an abundant number, since it is smaller than the sum of its proper divisors (305192283644).

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

161193107100 is a wasteful number, since it uses less digits than its factorization.

161193107100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537310374 (or 537310367 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 30.

Adding to 161193107100 its reverse (1701391161), we get a palindrome (162894498261).

The spelling of 161193107100 in words is "one hundred sixty-one billion, one hundred ninety-three million, one hundred seven thousand, one hundred".