161361700 has 36 divisors (see below), whose sum is σ = 355102272. Its totient is φ = 63632800.

The previous prime is 161361689. The next prime is 161361709. The reversal of 161361700 is 7163161.

It is a happy number.

161361700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161361709) 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, 4264 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (9863952).

Almost surely, 2^161361700 is an apocalyptic number.

161361700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161361700 is an abundant number, since it is smaller than the sum of its proper divisors (193740572).

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

161361700 is a wasteful number, since it uses less digits than its factorization.

161361700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22812 (or 22805 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 161361700 is about 12702.8225209990. The cubic root of 161361700 is about 544.4192675047.

The spelling of 161361700 in words is "one hundred sixty-one million, three hundred sixty-one thousand, seven hundred".