161401716 has 36 divisors (see below), whose sum is σ = 466272352. Its totient is φ = 46114704.

The previous prime is 161401703. The next prime is 161401739. The reversal of 161401716 is 617104161.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 161401716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319990 + ... + 320493.

Almost surely, 2^161401716 is an apocalyptic number.

It is an amenable number.

161401716 is an abundant number, since it is smaller than the sum of its proper divisors (304870636).

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

161401716 is a wasteful number, since it uses less digits than its factorization.

161401716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640500 (or 640495 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 161401716 is about 12704.3975063755. The cubic root of 161401716 is about 544.4642671975.

Adding to 161401716 its reverse (617104161), we get a palindrome (778505877).

The spelling of 161401716 in words is "one hundred sixty-one million, four hundred one thousand, seven hundred sixteen".