651265445550 has 96 divisors (see below), whose sum is σ = 1628865745920. Its totient is φ = 172200960000.

The previous prime is 651265445533. The next prime is 651265445561. The reversal of 651265445550 is 55544562156.

651265445550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 651265445550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8357166 + ... + 8434734.

It is an arithmetic number, because the mean of its divisors is an integer number (16967351520).

Almost surely, 2^651265445550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651265445550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814432872960).

651265445550 is an abundant number, since it is smaller than the sum of its proper divisors (977600300370).

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

651265445550 is a wasteful number, since it uses less digits than its factorization.

651265445550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78058 (or 78053 counting only the distinct ones).

The product of its (nonzero) digits is 3600000, while the sum is 48.

The spelling of 651265445550 in words is "six hundred fifty-one billion, two hundred sixty-five million, four hundred forty-five thousand, five hundred fifty".