16161534450 has 96 divisors (see below), whose sum is σ = 44745856320. Its totient is φ = 4289241600.

The previous prime is 16161534443. The next prime is 16161534457. The reversal of 16161534450 is 5443516161.

16161534450 is a `hidden beast` number, since 1 + 6 + 1 + 615 + 34 + 4 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (16161534443) and next prime (16161534457).

It is a super-2 number, since 2×16161534450² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16161534457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256482 + ... + 313218.

It is an arithmetic number, because the mean of its divisors is an integer number (466102670).

Almost surely, 2^16161534450 is an apocalyptic number.

16161534450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16161534450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22372928160).

16161534450 is an abundant number, since it is smaller than the sum of its proper divisors (28584321870).

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

16161534450 is a wasteful number, since it uses less digits than its factorization.

16161534450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56969 (or 56958 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 16161534450 in words is "sixteen billion, one hundred sixty-one million, five hundred thirty-four thousand, four hundred fifty".