16465134240 has 144 divisors (see below), whose sum is σ = 57557898216. Its totient is φ = 4283596800.

The previous prime is 16465134233. The next prime is 16465134241. The reversal of 16465134240 is 4243156461.

16465134240 is a `hidden beast` number, since 1 + 64 + 6 + 513 + 42 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9487539216 + 6977595024 = 97404^2 + 83532^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×16465134240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16465134195 and 16465134204.

It is not an unprimeable number, because it can be changed into a prime (16465134241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80401 + ... + 198480.

Almost surely, 2^16465134240 is an apocalyptic number.

16465134240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16465134240 is an abundant number, since it is smaller than the sum of its proper divisors (41092763976).

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

16465134240 is a wasteful number, since it uses less digits than its factorization.

16465134240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278943 (or 278932 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

It can be divided in two parts, 164651 and 34240, that added together give a palindrome (198891).

The spelling of 16465134240 in words is "sixteen billion, four hundred sixty-five million, one hundred thirty-four thousand, two hundred forty".