161952719397 has 32 divisors (see below), whose sum is σ = 249310064640. Its totient is φ = 91598480640.

The previous prime is 161952719387. The next prime is 161952719519. The reversal of 161952719397 is 793917259161.

It is not a de Polignac number, because 161952719397 - 2¹⁰ = 161952718373 is a prime.

It is a super-3 number, since 3×161952719397³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161952719397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161952719387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4391997 + ... + 4428717.

It is an arithmetic number, because the mean of its divisors is an integer number (7790939520).

Almost surely, 2^161952719397 is an apocalyptic number.

It is an amenable number.

161952719397 is a deficient number, since it is larger than the sum of its proper divisors (87357345243).

161952719397 is a wasteful number, since it uses less digits than its factorization.

161952719397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38873.

The product of its digits is 6429780, while the sum is 60.

The spelling of 161952719397 in words is "one hundred sixty-one billion, nine hundred fifty-two million, seven hundred nineteen thousand, three hundred ninety-seven".