651212450020 has 96 divisors (see below), whose sum is σ = 1515065731200. Its totient is φ = 233148672000.

The previous prime is 651212450017. The next prime is 651212450113. The reversal of 651212450020 is 20054212156.

It is a super-2 number, since 2×651212450020² (a number of 24 digits) contains 22 as substring.

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, 3895516 + ... + 4059244.

It is an arithmetic number, because the mean of its divisors is an integer number (15781934700).

Almost surely, 2^651212450020 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 651212450020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757532865600).

651212450020 is an abundant number, since it is smaller than the sum of its proper divisors (863853281180).

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

651212450020 is a wasteful number, since it uses less digits than its factorization.

651212450020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164029 (or 164027 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 651212450020 its reverse (20054212156), we get a palindrome (671266662176).

The spelling of 651212450020 in words is "six hundred fifty-one billion, two hundred twelve million, four hundred fifty thousand, twenty".