651375327440 has 80 divisors (see below), whose sum is σ = 1550118643200. Its totient is φ = 254437908480.

The previous prime is 651375327397. The next prime is 651375327451. The reversal of 651375327440 is 44723573156.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1495325 + ... + 1881155.

It is an arithmetic number, because the mean of its divisors is an integer number (19376483040).

Almost surely, 2^651375327440 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 651375327440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775059321600).

651375327440 is an abundant number, since it is smaller than the sum of its proper divisors (898743315760).

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

651375327440 is a wasteful number, since it uses less digits than its factorization.

651375327440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386340 (or 386334 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 47.

The spelling of 651375327440 in words is "six hundred fifty-one billion, three hundred seventy-five million, three hundred twenty-seven thousand, four hundred forty".