16172538450 has 48 divisors (see below), whose sum is σ = 40116003840. Its totient is φ = 4311805120.

The previous prime is 16172538449. The next prime is 16172538451. The reversal of 16172538450 is 5483527161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16172538449) and next prime (16172538451).

It is not an unprimeable number, because it can be changed into a prime (16172538451) 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 23 ways as a sum of consecutive naturals, for example, 1131247 + ... + 1145453.

It is an arithmetic number, because the mean of its divisors is an integer number (835750080).

Almost surely, 2^16172538450 is an apocalyptic number.

16172538450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16172538450 is an abundant number, since it is smaller than the sum of its proper divisors (23943465390).

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

16172538450 is a wasteful number, since it uses less digits than its factorization.

16172538450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21811 (or 21806 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 16172538450 in words is "sixteen billion, one hundred seventy-two million, five hundred thirty-eight thousand, four hundred fifty".