646220251225320 has 32 divisors (see below), whose sum is σ = 1938660753676320. Its totient is φ = 172325400326720.

The previous prime is 646220251225313. The next prime is 646220251225337. The reversal of 646220251225320 is 23522152022646.

646220251225320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×646220251225320² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2692584379986 + ... + 2692584380225.

It is an arithmetic number, because the mean of its divisors is an integer number (60583148552385).

Almost surely, 2^{646220251225320} is an apocalyptic number.

646220251225320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646220251225320 is an abundant number, since it is smaller than the sum of its proper divisors (1292440502451000).

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

646220251225320 is a wasteful number, since it uses less digits than its factorization.

646220251225320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385168760225 (or 5385168760221 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 646220251225320 in words is "six hundred forty-six trillion, two hundred twenty billion, two hundred fifty-one million, two hundred twenty-five thousand, three hundred twenty".