651006738 has 96 divisors (see below), whose sum is σ = 1538003376. Its totient is φ = 198242304.

The previous prime is 651006737. The next prime is 651006757. The reversal of 651006738 is 837600156.

It can be written as a sum of positive squares in 8 ways, for example, as 624350169 + 26656569 = 24987^2 + 5163^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (651006737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2221720 + ... + 2222012.

Almost surely, 2^651006738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651006738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769001688).

651006738 is an abundant number, since it is smaller than the sum of its proper divisors (886996638).

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

651006738 is a wasteful number, since it uses less digits than its factorization.

651006738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 651006738 is about 25514.8336855250. The cubic root of 651006738 is about 866.6860930228.

The spelling of 651006738 in words is "six hundred fifty-one million, six thousand, seven hundred thirty-eight".