652511640 has 64 divisors (see below), whose sum is σ = 2135496960. Its totient is φ = 158184320.

The previous prime is 652511609. The next prime is 652511641. The reversal of 652511640 is 46115256.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 652511598 and 652511607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652511641) 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 15 ways as a sum of consecutive naturals, for example, 245844 + ... + 248483.

It is an arithmetic number, because the mean of its divisors is an integer number (33367140).

Almost surely, 2^652511640 is an apocalyptic number.

652511640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

652511640 is an abundant number, since it is smaller than the sum of its proper divisors (1482985320).

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

652511640 is a wasteful number, since it uses less digits than its factorization.

652511640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494352 (or 494348 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 652511640 is about 25544.3073893187. The cubic root of 652511640 is about 867.3534050667.

Adding to 652511640 its reverse (46115256), we get a palindrome (698626896).

The spelling of 652511640 in words is "six hundred fifty-two million, five hundred eleven thousand, six hundred forty".