651420000 has 720 divisors, whose sum is σ = 2947456512. Its totient is φ = 132480000.

The previous prime is 651419971. The next prime is 651420001. The reversal of 651420000 is 24156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651420001) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 13859977 + ... + 13860023.

Almost surely, 2^651420000 is an apocalyptic number.

651420000 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 651420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473728256).

651420000 is an abundant number, since it is smaller than the sum of its proper divisors (2296036512).

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

651420000 is a wasteful number, since it uses less digits than its factorization.

651420000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 651420000 is about 25522.9308661838. The cubic root of 651420000 is about 866.8694463047.

Adding to 651420000 its reverse (24156), we get a palindrome (651444156).

The spelling of 651420000 in words is "six hundred fifty-one million, four hundred twenty thousand".