64365643530 has 48 divisors (see below), whose sum is σ = 167401077480. Its totient is φ = 17159001984.

The previous prime is 64365643513. The next prime is 64365643541. The reversal of 64365643530 is 3534656346.

64365643530 is a `hidden beast` number, since 6 + 4 + 36 + 564 + 3 + 53 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 56526489009 + 7839154521 = 237753^2 + 88539^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197556 + ... + 409584.

Almost surely, 2^64365643530 is an apocalyptic number.

64365643530 is an abundant number, since it is smaller than the sum of its proper divisors (103035433950).

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

64365643530 is a wasteful number, since it uses less digits than its factorization.

64365643530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215415 (or 215412 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 45.

The spelling of 64365643530 in words is "sixty-four billion, three hundred sixty-five million, six hundred forty-three thousand, five hundred thirty".