161150861252640 has 384 divisors, whose sum is σ = 596407996961280. Its totient is φ = 35808185548800.

The previous prime is 161150861252603. The next prime is 161150861252699. The reversal of 161150861252640 is 46252168051161.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 161150861252640.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36629076 + ... + 40792044.

It is an arithmetic number, because the mean of its divisors is an integer number (1553145825420).

Almost surely, 2^{161150861252640} is an apocalyptic number.

161150861252640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161150861252640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298203998480640).

161150861252640 is an abundant number, since it is smaller than the sum of its proper divisors (435257135708640).

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

161150861252640 is a wasteful number, since it uses less digits than its factorization.

161150861252640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163316 (or 4163308 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 161150861252640 in words is "one hundred sixty-one trillion, one hundred fifty billion, eight hundred sixty-one million, two hundred fifty-two thousand, six hundred forty".