161235456330 has 64 divisors (see below), whose sum is σ = 420554977920. Its totient is φ = 39324600576.

The previous prime is 161235456259. The next prime is 161235456337. The reversal of 161235456330 is 33654532161.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (161235456337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1853932 + ... + 1938951.

It is an arithmetic number, because the mean of its divisors is an integer number (6571171530).

Almost surely, 2^161235456330 is an apocalyptic number.

161235456330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161235456330 is an abundant number, since it is smaller than the sum of its proper divisors (259319521590).

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

161235456330 is a wasteful number, since it uses less digits than its factorization.

161235456330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793015.

The product of its (nonzero) digits is 194400, while the sum is 39.

Adding to 161235456330 its reverse (33654532161), we get a palindrome (194889988491).

The spelling of 161235456330 in words is "one hundred sixty-one billion, two hundred thirty-five million, four hundred fifty-six thousand, three hundred thirty".