651560642 has 8 divisors (see below), whose sum is σ = 993363132. Its totient is φ = 320439600.

The previous prime is 651560617. The next prime is 651560699. The reversal of 651560642 is 246065156.

It can be written as a sum of positive squares in 2 ways, for example, as 464445601 + 187115041 = 21551^2 + 13679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 2670209 + ... + 2670452.

Almost surely, 2^651560642 is an apocalyptic number.

651560642 is a deficient number, since it is larger than the sum of its proper divisors (341802490).

651560642 is a wasteful number, since it uses less digits than its factorization.

651560642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340724.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 651560642 is about 25525.6859261411. The cubic root of 651560642 is about 866.9318277072.

The spelling of 651560642 in words is "six hundred fifty-one million, five hundred sixty thousand, six hundred forty-two".