161232063700 has 18 divisors (see below), whose sum is σ = 349873578446. Its totient is φ = 64492825440.

The previous prime is 161232063689. The next prime is 161232063709. The reversal of 161232063700 is 7360232161.

It can be written as a sum of positive squares in 3 ways, for example, as 40918816656 + 120313247044 = 202284^2 + 346862^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161232063709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 806160219 + ... + 806160418.

Almost surely, 2^161232063700 is an apocalyptic number.

161232063700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161232063700 is an abundant number, since it is smaller than the sum of its proper divisors (188641514746).

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

161232063700 is a wasteful number, since it uses less digits than its factorization.

161232063700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612320651 (or 1612320644 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

Adding to 161232063700 its reverse (7360232161), we get a palindrome (168592295861).

The spelling of 161232063700 in words is "one hundred sixty-one billion, two hundred thirty-two million, sixty-three thousand, seven hundred".