161488646928 has 360 divisors, whose sum is σ = 546452524800. Its totient is φ = 44336291328.

The previous prime is 161488646881. The next prime is 161488646933. The reversal of 161488646928 is 829646884161.

161488646928 is a `hidden beast` number, since 1 + 6 + 1 + 488 + 64 + 6 + 92 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 45629383 + ... + 45632921.

It is an arithmetic number, because the mean of its divisors is an integer number (1517923680).

Almost surely, 2^161488646928 is an apocalyptic number.

161488646928 is a gapful number since it is divisible by the number (18) 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 161488646928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273226262400).

161488646928 is an abundant number, since it is smaller than the sum of its proper divisors (384963877872).

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

161488646928 is a wasteful number, since it uses less digits than its factorization.

161488646928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819 (or 3803 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 63.

The spelling of 161488646928 in words is "one hundred sixty-one billion, four hundred eighty-eight million, six hundred forty-six thousand, nine hundred twenty-eight".