64530550 has 36 divisors (see below), whose sum is σ = 139628340. Its totient is φ = 22123920.

The previous prime is 64530541. The next prime is 64530629. The reversal of 64530550 is 5503546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10720 + ... + 15619.

It is an arithmetic number, because the mean of its divisors is an integer number (3878565).

Almost surely, 2^64530550 is an apocalyptic number.

64530550 is an abundant number, since it is smaller than the sum of its proper divisors (75097790).

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

64530550 is a wasteful number, since it uses less digits than its factorization.

64530550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26365 (or 26353 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 64530550 is about 8033.0909368686. The cubic root of 64530550 is about 401.1022721999.

The spelling of 64530550 in words is "sixty-four million, five hundred thirty thousand, five hundred fifty".