651563520 has 160 divisors (see below), whose sum is σ = 2132488512. Its totient is φ = 169623552.

The previous prime is 651563489. The next prime is 651563531. The reversal of 651563520 is 25365156.

It is a tau number, because it is divible by the number of its divisors (160).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329254 + ... + 331226.

Almost surely, 2^651563520 is an apocalyptic number.

651563520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651563520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066244256).

651563520 is an abundant number, since it is smaller than the sum of its proper divisors (1480924992).

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

651563520 is a wasteful number, since it uses less digits than its factorization.

651563520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042 (or 2026 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 651563520 is about 25525.7423006658. The cubic root of 651563520 is about 866.9331041431.

The spelling of 651563520 in words is "six hundred fifty-one million, five hundred sixty-three thousand, five hundred twenty".