6468987191056 has 40 divisors (see below), whose sum is σ = 13500140927000. Its totient is φ = 2985166503936.

The previous prime is 6468987191021. The next prime is 6468987191071. The reversal of 6468987191056 is 6501917898646.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1034866736656 + 5434120454400 = 1017284^2 + 2331120^2 .

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, 1509105 + ... + 3900688.

It is an arithmetic number, because the mean of its divisors is an integer number (337503523175).

Almost surely, 2^{6468987191056} is an apocalyptic number.

It is an amenable number.

6468987191056 is an abundant number, since it is smaller than the sum of its proper divisors (7031153735944).

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

6468987191056 is a wasteful number, since it uses less digits than its factorization.

6468987191056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5415563 (or 5415557 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 6468987191056 in words is "six trillion, four hundred sixty-eight billion, nine hundred eighty-seven million, one hundred ninety-one thousand, fifty-six".