161215237443304 has 64 divisors (see below), whose sum is σ = 347116783104000. Its totient is φ = 69422302422720.

The previous prime is 161215237443287. The next prime is 161215237443349. The reversal of 161215237443304 is 403344732512161.

It is a super-2 number, since 2×161215237443304² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287676927 + ... + 288236785.

It is an arithmetic number, because the mean of its divisors is an integer number (5423699736000).

Almost surely, 2^{161215237443304} is an apocalyptic number.

It is an amenable number.

161215237443304 is an abundant number, since it is smaller than the sum of its proper divisors (185901545660696).

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

161215237443304 is a wasteful number, since it uses less digits than its factorization.

161215237443304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732118 (or 732114 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 46.

Adding to 161215237443304 its reverse (403344732512161), we get a palindrome (564559969955465).

The spelling of 161215237443304 in words is "one hundred sixty-one trillion, two hundred fifteen billion, two hundred thirty-seven million, four hundred forty-three thousand, three hundred four".