161206137363772 has 12 divisors (see below), whose sum is σ = 282110967959800. Its totient is φ = 80603003660976.

The previous prime is 161206137363769. The next prime is 161206137363811. The reversal of 161206137363772 is 277363731602161.

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 3 ways as a sum of consecutive naturals, for example, 10446147 + ... + 20773402.

Almost surely, 2^{161206137363772} is an apocalyptic number.

It is an amenable number.

161206137363772 is a deficient number, since it is larger than the sum of its proper divisors (120904830596028).

161206137363772 is a wasteful number, since it uses less digits than its factorization.

161206137363772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32510460 (or 32510458 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 55.

The spelling of 161206137363772 in words is "one hundred sixty-one trillion, two hundred six billion, one hundred thirty-seven million, three hundred sixty-three thousand, seven hundred seventy-two".