651363984 has 80 divisors (see below), whose sum is σ = 1920234240. Its totient is φ = 211248000.

The previous prime is 651363967. The next prime is 651363991. The reversal of 651363984 is 489363156.

651363984 is a `hidden beast` number, since 6 + 5 + 1 + 3 + 639 + 8 + 4 = 666.

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, 4392 + ... + 36359.

It is an arithmetic number, because the mean of its divisors is an integer number (24002928).

Almost surely, 2^651363984 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 651363984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960117120).

651363984 is an abundant number, since it is smaller than the sum of its proper divisors (1268870256).

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

651363984 is a wasteful number, since it uses less digits than its factorization.

651363984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40805 (or 40793 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 651363984 is about 25521.8334764570. The cubic root of 651363984 is about 866.8445980497.

The spelling of 651363984 in words is "six hundred fifty-one million, three hundred sixty-three thousand, nine hundred eighty-four".