64268421188 has 48 divisors (see below), whose sum is σ = 123361282800. Its totient is φ = 29174661120.

The previous prime is 64268421181. The next prime is 64268421211. The reversal of 64268421188 is 88112486246.

It can be written as a sum of positive squares in 8 ways, for example, as 8493096964 + 55775324224 = 92158^2 + 236168^2 .

It is not an unprimeable number, because it can be changed into a prime (64268421181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118628 + ... + 377636.

It is an arithmetic number, because the mean of its divisors is an integer number (2570026725).

Almost surely, 2^64268421188 is an apocalyptic number.

64268421188 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64268421188 is a deficient number, since it is larger than the sum of its proper divisors (59092861612).

64268421188 is a wasteful number, since it uses less digits than its factorization.

64268421188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259160 (or 259158 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 50.

The spelling of 64268421188 in words is "sixty-four billion, two hundred sixty-eight million, four hundred twenty-one thousand, one hundred eighty-eight".