5161904640 has 120 divisors (see below), whose sum is σ = 17877207348. Its totient is φ = 1376501760.

The previous prime is 5161904603. The next prime is 5161904641. The reversal of 5161904640 is 464091615.

5161904640 is a `hidden beast` number, since 5 + 1 + 6 + 1 + 9 + 0 + 4 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5094533376 + 67371264 = 71376^2 + 8208^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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 = 5161904595 and 5161904604.

It is not an unprimeable number, because it can be changed into a prime (5161904641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88981 + ... + 135060.

Almost surely, 2^5161904640 is an apocalyptic number.

It is an amenable number.

5161904640 is an abundant number, since it is smaller than the sum of its proper divisors (12715302708).

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

5161904640 is a wasteful number, since it uses less digits than its factorization.

5161904640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224070 (or 224051 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 5161904640 is about 71846.3961517904. The cubic root of 5161904640 is about 1728.2371073815.

The spelling of 5161904640 in words is "five billion, one hundred sixty-one million, nine hundred four thousand, six hundred forty".