6574640436 has 144 divisors (see below), whose sum is σ = 21344004864. Its totient is φ = 1658562048.

The previous prime is 6574640419. The next prime is 6574640441. The reversal of 6574640436 is 6340464756.

It is a happy number.

6574640436 is a `hidden beast` number, since 6 + 574 + 6 + 40 + 4 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6574640391 and 6574640400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31720 + ... + 118976.

It is an arithmetic number, because the mean of its divisors is an integer number (148222256).

Almost surely, 2^6574640436 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 6574640436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10672002432).

6574640436 is an abundant number, since it is smaller than the sum of its proper divisors (14769364428).

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

6574640436 is a wasteful number, since it uses less digits than its factorization.

6574640436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87310 (or 87305 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The square root of 6574640436 is about 81084.1565042148. The cubic root of 6574640436 is about 1873.3719021144.

The spelling of 6574640436 in words is "six billion, five hundred seventy-four million, six hundred forty thousand, four hundred thirty-six".