651132133520 has 80 divisors (see below), whose sum is σ = 1674768700800. Its totient is φ = 233440435200.

The previous prime is 651132133511. The next prime is 651132133523. The reversal of 651132133520 is 25331231156.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (651132133523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5148245 + ... + 5273204.

It is an arithmetic number, because the mean of its divisors is an integer number (20934608760).

Almost surely, 2^651132133520 is an apocalyptic number.

It is an amenable number.

651132133520 is an abundant number, since it is smaller than the sum of its proper divisors (1023636567280).

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

651132133520 is a wasteful number, since it uses less digits than its factorization.

651132133520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421544 (or 10421538 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 651132133520 its reverse (25331231156), we get a palindrome (676463364676).

The spelling of 651132133520 in words is "six hundred fifty-one billion, one hundred thirty-two million, one hundred thirty-three thousand, five hundred twenty".