651608064 has 150 divisors (see below), whose sum is σ = 1950685044. Its totient is φ = 216760320.

The previous prime is 651608063. The next prime is 651608081. The reversal of 651608064 is 460806156.

651608064 is a `hidden beast` number, since 6 + 516 + 0 + 80 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (651608063) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1326859 + ... + 1327349.

Almost surely, 2^651608064 is an apocalyptic number.

651608064 is a gapful number since it is divisible by the number (64) 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 651608064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975342522).

651608064 is an abundant number, since it is smaller than the sum of its proper divisors (1299076980).

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

651608064 is an frugal number, since it uses more digits than its factorization.

651608064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 651608064 is about 25526.6148166967. The cubic root of 651608064 is about 866.9528595914.

The spelling of 651608064 in words is "six hundred fifty-one million, six hundred eight thousand, sixty-four".