651861603 has 12 divisors (see below), whose sum is σ = 954477160. Its totient is φ = 428620896.

The previous prime is 651861593. The next prime is 651861629. The reversal of 651861603 is 306168156.

It is a happy number.

It is not a de Polignac number, because 651861603 - 2⁵ = 651861571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651861673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495433 + ... + 496746.

Almost surely, 2^651861603 is an apocalyptic number.

651861603 is a deficient number, since it is larger than the sum of its proper divisors (302615557).

651861603 is a wasteful number, since it uses less digits than its factorization.

651861603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992258 (or 992255 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 651861603 is about 25531.5805033688. The cubic root of 651861603 is about 867.0652880437.

It can be divided in two parts, 6518 and 61603, that added together give a square (68121 = 261²).

The spelling of 651861603 in words is "six hundred fifty-one million, eight hundred sixty-one thousand, six hundred three".