5291252640 has 384 divisors, whose sum is σ = 19086762240. Its totient is φ = 1368576000.

The previous prime is 5291252627. The next prime is 5291252647. The reversal of 5291252640 is 462521925.

5291252640 is a `hidden beast` number, since 5 + 2 + 9 + 1 + 2 + 5 + 2 + 640 = 666.

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 = 5291252595 and 5291252604.

It is not an unprimeable number, because it can be changed into a prime (5291252647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29233350 + ... + 29233530.

It is an arithmetic number, because the mean of its divisors is an integer number (49705110).

Almost surely, 2^5291252640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5291252640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9543381120).

5291252640 is an abundant number, since it is smaller than the sum of its proper divisors (13795509600).

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

5291252640 is a wasteful number, since it uses less digits than its factorization.

5291252640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 359 counting only the distinct ones).

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

The square root of 5291252640 is about 72740.9969686971. The cubic root of 5291252640 is about 1742.5536819269.

The spelling of 5291252640 in words is "five billion, two hundred ninety-one million, two hundred fifty-two thousand, six hundred forty".