16406332500 has 60 divisors (see below), whose sum is σ = 47836512416. Its totient is φ = 4375020000.

The previous prime is 16406332493. The next prime is 16406332507. The reversal of 16406332500 is 523360461.

It is an interprime number because it is at equal distance from previous prime (16406332493) and next prime (16406332507).

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×16406332500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406332507) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1086256 + ... + 1101255.

Almost surely, 2^16406332500 is an apocalyptic number.

16406332500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16406332500 is an abundant number, since it is smaller than the sum of its proper divisors (31430179916).

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

16406332500 is a wasteful number, since it uses less digits than its factorization.

16406332500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187538 (or 2187521 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 16406332500 its reverse (523360461), we get a palindrome (16929692961).

The spelling of 16406332500 in words is "sixteen billion, four hundred six million, three hundred thirty-two thousand, five hundred".