651300226440 has 128 divisors (see below), whose sum is σ = 1987485413760. Its totient is φ = 170716012544.

The previous prime is 651300226417. The next prime is 651300226531. The reversal of 651300226440 is 44622003156.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1796152 + ... + 2128088.

It is an arithmetic number, because the mean of its divisors is an integer number (15527229795).

Almost surely, 2^651300226440 is an apocalyptic number.

651300226440 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 651300226440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993742706880).

651300226440 is an abundant number, since it is smaller than the sum of its proper divisors (1336185187320).

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

651300226440 is a wasteful number, since it uses less digits than its factorization.

651300226440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332231 (or 332227 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 651300226440 its reverse (44622003156), we get a palindrome (695922229596).

The spelling of 651300226440 in words is "six hundred fifty-one billion, three hundred million, two hundred twenty-six thousand, four hundred forty".