651634652244 has 96 divisors (see below), whose sum is σ = 1636222049280. Its totient is φ = 201103068672.

The previous prime is 651634652239. The next prime is 651634652287. The reversal of 651634652244 is 442256436156.

It is a junction number, because it is equal to n+sod(n) for n = 651634652193 and 651634652202.

It is a congruent number.

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, 9903847 + ... + 9969425.

It is an arithmetic number, because the mean of its divisors is an integer number (17043979680).

Almost surely, 2^651634652244 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 651634652244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818111024640).

651634652244 is an abundant number, since it is smaller than the sum of its proper divisors (984587397036).

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

651634652244 is a wasteful number, since it uses less digits than its factorization.

651634652244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66397 (or 66395 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 48.

The spelling of 651634652244 in words is "six hundred fifty-one billion, six hundred thirty-four million, six hundred fifty-two thousand, two hundred forty-four".