161742703686 has 16 divisors (see below), whose sum is σ = 323490081024. Its totient is φ = 53913455624.

The previous prime is 161742703673. The next prime is 161742703691. The reversal of 161742703686 is 686307247161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390415 + ... + 689861.

It is an arithmetic number, because the mean of its divisors is an integer number (20218130064).

Almost surely, 2^161742703686 is an apocalyptic number.

161742703686 is an abundant number, since it is smaller than the sum of its proper divisors (161747377338).

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

161742703686 is a wasteful number, since it uses less digits than its factorization.

161742703686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389475.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 161742703686 in words is "one hundred sixty-one billion, seven hundred forty-two million, seven hundred three thousand, six hundred eighty-six".