161354140000 has 120 divisors (see below), whose sum is σ = 420306590088. Its totient is φ = 60744960000.

The previous prime is 161354139889. The next prime is 161354140063. The reversal of 161354140000 is 41453161.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 102715 + ... + 577285.

Almost surely, 2^161354140000 is an apocalyptic number.

161354140000 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 161354140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210153295044).

161354140000 is an abundant number, since it is smaller than the sum of its proper divisors (258952450088).

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

161354140000 is an equidigital number, since it uses as much as digits as its factorization.

161354140000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474618 (or 474595 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 161354140000 its reverse (41453161), we get a palindrome (161395593161).

The spelling of 161354140000 in words is "one hundred sixty-one billion, three hundred fifty-four million, one hundred forty thousand".