651402898737864 has 384 divisors, whose sum is σ = 2096070102927360. Its totient is φ = 167089619515392.

The previous prime is 651402898737853. The next prime is 651402898737881. The reversal of 651402898737864 is 468737898204156.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a self number, because there is not a number n which added to its sum of digits gives 651402898737864.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1446157209 + ... + 1446607575.

It is an arithmetic number, because the mean of its divisors is an integer number (5458515893040).

It is a 1-persistent number, because it is pandigital, but 2⋅651402898737864 = 1302805797475728 is not.

Almost surely, 2^{651402898737864} 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 651402898737864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048035051463680).

651402898737864 is an abundant number, since it is smaller than the sum of its proper divisors (1444667204189496).

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

651402898737864 is a wasteful number, since it uses less digits than its factorization.

651402898737864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452997 (or 452986 counting only the distinct ones).

The product of its (nonzero) digits is 3901685760, while the sum is 78.

The spelling of 651402898737864 in words is "six hundred fifty-one trillion, four hundred two billion, eight hundred ninety-eight million, seven hundred thirty-seven thousand, eight hundred sixty-four".