161281680936 has 16 divisors (see below), whose sum is σ = 403204202400. Its totient is φ = 53760560304.

The previous prime is 161281680919. The next prime is 161281680949. The reversal of 161281680936 is 639086182161.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3360034996 + ... + 3360035043.

It is an arithmetic number, because the mean of its divisors is an integer number (25200262650).

Almost surely, 2^161281680936 is an apocalyptic number.

It is an amenable number.

161281680936 is an abundant number, since it is smaller than the sum of its proper divisors (241922521464).

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

161281680936 is a wasteful number, since it uses less digits than its factorization.

161281680936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6720070048 (or 6720070044 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 161281680936 in words is "one hundred sixty-one billion, two hundred eighty-one million, six hundred eighty thousand, nine hundred thirty-six".