651878960 has 20 divisors (see below), whose sum is σ = 1515618768. Its totient is φ = 260751552.

The previous prime is 651878939. The next prime is 651878963. The reversal of 651878960 is 69878156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 651878899 and 651878908.

It is not an unprimeable number, because it can be changed into a prime (651878963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4074164 + ... + 4074323.

Almost surely, 2^651878960 is an apocalyptic number.

It is an amenable number.

651878960 is an abundant number, since it is smaller than the sum of its proper divisors (863739808).

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

651878960 is a wasteful number, since it uses less digits than its factorization.

651878960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8148500 (or 8148494 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 651878960 is about 25531.9204134746. The cubic root of 651878960 is about 867.0729837052.

It can be divided in two parts, 65187 and 8960, that added together give a palindrome (74147).

The spelling of 651878960 in words is "six hundred fifty-one million, eight hundred seventy-eight thousand, nine hundred sixty".