6461687520428 has 24 divisors (see below), whose sum is σ = 12958022179872. Its totient is φ = 2761870264704.

The previous prime is 6461687520347. The next prime is 6461687520499. The reversal of 6461687520428 is 8240257861646.

It is a super-2 number, since 2×6461687520428² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309338825 + ... + 309359712.

It is an arithmetic number, because the mean of its divisors is an integer number (539917590828).

Almost surely, 2^{6461687520428} is an apocalyptic number.

It is an amenable number.

6461687520428 is an abundant number, since it is smaller than the sum of its proper divisors (6496334659444).

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

6461687520428 is a wasteful number, since it uses less digits than its factorization.

6461687520428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618698921 (or 618698919 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 59.

The spelling of 6461687520428 in words is "six trillion, four hundred sixty-one billion, six hundred eighty-seven million, five hundred twenty thousand, four hundred twenty-eight".