161201270742 has 16 divisors (see below), whose sum is σ = 323566452912. Its totient is φ = 53539771680.

The previous prime is 161201270719. The next prime is 161201270749. The reversal of 161201270742 is 247072102161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161201270749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48494509 + ... + 48497832.

It is an arithmetic number, because the mean of its divisors is an integer number (20222903307).

Almost surely, 2^161201270742 is an apocalyptic number.

161201270742 is an abundant number, since it is smaller than the sum of its proper divisors (162365182170).

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

161201270742 is a wasteful number, since it uses less digits than its factorization.

161201270742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96992623.

The product of its (nonzero) digits is 9408, while the sum is 33.

The spelling of 161201270742 in words is "one hundred sixty-one billion, two hundred one million, two hundred seventy thousand, seven hundred forty-two".