651320463420 has 72 divisors (see below), whose sum is σ = 2155278630960. Its totient is φ = 157895869440.

The previous prime is 651320463413. The next prime is 651320463457. The reversal of 651320463420 is 24364023156.

651320463420 is a `hidden beast` number, since 6 + 5 + 13 + 2 + 0 + 4 + 634 + 2 + 0 = 666.

651320463420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164472885 + ... + 164476844.

It is an arithmetic number, because the mean of its divisors is an integer number (29934425430).

Almost surely, 2^651320463420 is an apocalyptic number.

651320463420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651320463420 is an abundant number, since it is smaller than the sum of its proper divisors (1503958167540).

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

651320463420 is a wasteful number, since it uses less digits than its factorization.

651320463420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328949755 (or 328949750 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 651320463420 its reverse (24364023156), we get a palindrome (675684486576).

The spelling of 651320463420 in words is "six hundred fifty-one billion, three hundred twenty million, four hundred sixty-three thousand, four hundred twenty".