651381072 has 20 divisors (see below), whose sum is σ = 1682734560. Its totient is φ = 217127008.

The previous prime is 651381023. The next prime is 651381173. The reversal of 651381072 is 270183156.

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 3 ways as a sum of consecutive naturals, for example, 6785172 + ... + 6785267.

It is an arithmetic number, because the mean of its divisors is an integer number (84136728).

Almost surely, 2^651381072 is an apocalyptic number.

It is an amenable number.

651381072 is an abundant number, since it is smaller than the sum of its proper divisors (1031353488).

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

651381072 is a wasteful number, since it uses less digits than its factorization.

651381072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13570450 (or 13570444 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 651381072 is about 25522.1682464480. The cubic root of 651381072 is about 866.8521783025.

The spelling of 651381072 in words is "six hundred fifty-one million, three hundred eighty-one thousand, seventy-two".