161233541400 has 192 divisors, whose sum is σ = 514268647200. Its totient is φ = 41762304000.

The previous prime is 161233541351. The next prime is 161233541401. The reversal of 161233541400 is 4145332161.

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 (161233541401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5619090 + ... + 5647710.

Almost surely, 2^161233541400 is an apocalyptic number.

161233541400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161233541400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257134323600).

161233541400 is an abundant number, since it is smaller than the sum of its proper divisors (353035105800).

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

161233541400 is a wasteful number, since it uses less digits than its factorization.

161233541400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28910 (or 28901 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 161233541400 its reverse (4145332161), we get a palindrome (165378873561).

The spelling of 161233541400 in words is "one hundred sixty-one billion, two hundred thirty-three million, five hundred forty-one thousand, four hundred".