64127819112 has 64 divisors (see below), whose sum is σ = 184843831680. Its totient is φ = 18160084992.

The previous prime is 64127819111. The next prime is 64127819113. The reversal of 64127819112 is 21191872146.

It is an interprime number because it is at equal distance from previous prime (64127819111) and next prime (64127819113).

It is a super-2 number, since 2×64127819112² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (64127819111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1670013 + ... + 1707980.

It is an arithmetic number, because the mean of its divisors is an integer number (2888184870).

Almost surely, 2^64127819112 is an apocalyptic number.

It is an amenable number.

64127819112 is an abundant number, since it is smaller than the sum of its proper divisors (120716012568).

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

64127819112 is a wasteful number, since it uses less digits than its factorization.

64127819112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378122 (or 3378118 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The spelling of 64127819112 in words is "sixty-four billion, one hundred twenty-seven million, eight hundred nineteen thousand, one hundred twelve".