161299727358 has 48 divisors (see below), whose sum is σ = 405248914560. Its totient is φ = 41896031760.

The previous prime is 161299727321. The next prime is 161299727359. The reversal of 161299727358 is 853727992161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161299727359) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15864628 + ... + 15874791.

It is an arithmetic number, because the mean of its divisors is an integer number (8442685720).

Almost surely, 2^161299727358 is an apocalyptic number.

161299727358 is an abundant number, since it is smaller than the sum of its proper divisors (243949187202).

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

161299727358 is a wasteful number, since it uses less digits than its factorization.

161299727358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31739453 (or 31739442 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 60.

The spelling of 161299727358 in words is "one hundred sixty-one billion, two hundred ninety-nine million, seven hundred twenty-seven thousand, three hundred fifty-eight".