161340036624 has 360 divisors, whose sum is σ = 512126596800. Its totient is φ = 48881304576.

The previous prime is 161340036589. The next prime is 161340036643. The reversal of 161340036624 is 426630043161.

161340036624 is a `hidden beast` number, since 1 + 613 + 4 + 0 + 0 + 36 + 6 + 2 + 4 = 666.

It is a super-2 number, since 2×161340036624² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 269348677 + ... + 269349275.

It is an arithmetic number, because the mean of its divisors is an integer number (1422573880).

Almost surely, 2^161340036624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161340036624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256063298400).

161340036624 is an abundant number, since it is smaller than the sum of its proper divisors (350786560176).

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

161340036624 is an equidigital number, since it uses as much as digits as its factorization.

161340036624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 161340036624 its reverse (426630043161), we get a palindrome (587970079785).

The spelling of 161340036624 in words is "one hundred sixty-one billion, three hundred forty million, thirty-six thousand, six hundred twenty-four".