651245652 has 18 divisors (see below), whose sum is σ = 1646204378. Its totient is φ = 217081872.

The previous prime is 651245593. The next prime is 651245701. The reversal of 651245652 is 256542156.

It can be written as a sum of positive squares in only one way, i.e., 601034256 + 50211396 = 24516^2 + 7086^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18090157 = 651245652 / (6 + 5 + 1 + 2 + 4 + 5 + 6 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 9045043 + ... + 9045114.

Almost surely, 2^651245652 is an apocalyptic number.

It is an amenable number.

651245652 is an abundant number, since it is smaller than the sum of its proper divisors (994958726).

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

651245652 is a wasteful number, since it uses less digits than its factorization.

651245652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18090167 (or 18090162 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 651245652 is about 25519.5151207855. The cubic root of 651245652 is about 866.7921022257.

The spelling of 651245652 in words is "six hundred fifty-one million, two hundred forty-five thousand, six hundred fifty-two".