651340261000 has 512 divisors, whose sum is σ = 1961511552000. Its totient is φ = 198653952000.

The previous prime is 651340260979. The next prime is 651340261007. The reversal of 651340261000 is 162043156.

It is a self number, because there is not a number n which added to its sum of digits gives 651340261000.

It is not an unprimeable number, because it can be changed into a prime (651340261007) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70494381 + ... + 70503619.

It is an arithmetic number, because the mean of its divisors is an integer number (3831077250).

Almost surely, 2^651340261000 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 651340261000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (980755776000).

651340261000 is an abundant number, since it is smaller than the sum of its proper divisors (1310171291000).

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

651340261000 is a wasteful number, since it uses less digits than its factorization.

651340261000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330 (or 9316 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 651340261000 in words is "six hundred fifty-one billion, three hundred forty million, two hundred sixty-one thousand".