651645552 has 20 divisors (see below), whose sum is σ = 1683417800. Its totient is φ = 217215168.

The previous prime is 651645541. The next prime is 651645557. The reversal of 651645552 is 255546156.

It is a happy number.

651645552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 651645552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651645557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6787927 + ... + 6788022.

It is an arithmetic number, because the mean of its divisors is an integer number (84170890).

Almost surely, 2^651645552 is an apocalyptic number.

It is an amenable number.

651645552 is an abundant number, since it is smaller than the sum of its proper divisors (1031772248).

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

651645552 is a wasteful number, since it uses less digits than its factorization.

651645552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13575960 (or 13575954 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The square root of 651645552 is about 25527.3490985649. The cubic root of 651645552 is about 866.9694849767.

The spelling of 651645552 in words is "six hundred fifty-one million, six hundred forty-five thousand, five hundred fifty-two".