161257247832 has 32 divisors (see below), whose sum is σ = 403178892480. Its totient is φ = 53747646240.

The previous prime is 161257247819. The next prime is 161257247857. The reversal of 161257247832 is 238742752161.

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 7 ways as a sum of consecutive naturals, for example, 16578 + ... + 568145.

It is an arithmetic number, because the mean of its divisors is an integer number (12599340390).

Almost surely, 2^161257247832 is an apocalyptic number.

161257247832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161257247832 is an abundant number, since it is smaller than the sum of its proper divisors (241921644648).

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

161257247832 is a wasteful number, since it uses less digits than its factorization.

161257247832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596223 (or 596219 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

Adding to 161257247832 its reverse (238742752161), we get a palindrome (399999999993).

The spelling of 161257247832 in words is "one hundred sixty-one billion, two hundred fifty-seven million, two hundred forty-seven thousand, eight hundred thirty-two".