651493040 has 240 divisors, whose sum is σ = 1827445536. Its totient is φ = 214917120.

The previous prime is 651493039. The next prime is 651493049. The reversal of 651493040 is 40394156.

It is a junction number, because it is equal to n+sod(n) for n = 651492988 and 651493006.

It is not an unprimeable number, because it can be changed into a prime (651493049) 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 47 ways as a sum of consecutive naturals, for example, 6088667 + ... + 6088773.

Almost surely, 2^651493040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651493040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913722768).

651493040 is an abundant number, since it is smaller than the sum of its proper divisors (1175952496).

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

651493040 is a wasteful number, since it uses less digits than its factorization.

651493040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 651493040 is about 25524.3616962305. The cubic root of 651493040 is about 866.9018441321.

The spelling of 651493040 in words is "six hundred fifty-one million, four hundred ninety-three thousand, forty".