651942680 has 16 divisors (see below), whose sum is σ = 1466871120. Its totient is φ = 260777056.

The previous prime is 651942677. The next prime is 651942691. The reversal of 651942680 is 86249156.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8149244 + ... + 8149323.

It is an arithmetic number, because the mean of its divisors is an integer number (91679445).

Almost surely, 2^651942680 is an apocalyptic number.

It is an amenable number.

651942680 is an abundant number, since it is smaller than the sum of its proper divisors (814928440).

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

651942680 is a wasteful number, since it uses less digits than its factorization.

651942680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16298578 (or 16298574 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 651942680 is about 25533.1682327125. The cubic root of 651942680 is about 867.1012343948.

The spelling of 651942680 in words is "six hundred fifty-one million, nine hundred forty-two thousand, six hundred eighty".